Relevant bibliographies by topics / Crossflow turbine

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Crossflow turbine'

Author: Grafiati
Published: 4 June 2025
Last updated: 15 July 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Crossflow turbine.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Crossflow turbine"

1

Kurniawati, Diniar Mungil. "Investigasi Performa Turbin Angin Crossflow Dengan Simulasi Numerik 2D." JTT (Jurnal Teknologi Terpadu) 8, no. 1 (2020): 7–12. http://dx.doi.org/10.32487/jtt.v8i1.762.

Full text
Abstract:
Wind turbine is a solution to harness of renewable energy because it requires wind as the main energy. Wind turbine work by extracting wind energy into electrical energy. Crossflow wind turbine is one of the wind turbines that are developed because it does not need wind direction to produce maximum efficiency. Crossflow wind turbines work with the concept of multiple interactions, namely in the first interaction the wind hits the first level of turbine blades, then the interaction of the two winds, the remainder of the first interaction enters the second level blades before leaving the wind turbine. In the design of crossflow wind turbine the diameter ratio and slope angle are important factors that influence to determine of performance in crossflow wind turbine. In this study varied the angle of slope 90 ° and variations in diameter ratio of 0.6 and 0.7. The study aimed to analyze the effect of diameter ratio and slope angle in performance of the crossflow wind turbine. This research was conducted with numerical simulation through 2D CFD modeling. The results showed that the best performance of crossflow wind turbine occurred at diameter ratio variation 0.7 in TSR 0.3 with the best CP value 0.34.
APA, Harvard, Vancouver, ISO, and other styles
2

Rantererung, Corvis L., and Atus Buku. "Comparison of Crossflow Turbine Performance through Nozzle Position Variations Using ANSYS Simulation." International Journal on Advanced Science, Engineering and Information Technology 13, no. 6 (2023): 2361–71. http://dx.doi.org/10.18517/ijaseit.13.6.19054.

Full text
Abstract:
The performance comparison of Crossflow turbines is greatly influenced by the position of the nozzle in the conversion of water energy into mechanical energy that occurs through the blades, runners, and shafts of Crossflow turbines. The study aims to directly examine the visualization of water fluid dynamics across the turbine runner blade and enhance the performance of the Crossflow turbine by varying the nozzle position. This study intends to investigate the impact of water flow dynamics and emission on the performance of Crossflow turbines with a combined horizontal-vertical nozzle position, specifically focusing on the magnitude of the number of turbine blades driven and the size of the runner blade area. The objective of investigating nozzle position variations in Crossflow turbines is to determine the specific nozzle position at which the turbine blade may efficiently extract maximum energy from the water flow, hence optimizing turbine performance. The research method using models made using CAD software is AutoCAD by exporting to IGES or IGS format to be compatible with ANSYS. The simulation of this research is with post-processing. There are three, namely making animations, making contours, and taking data to compare cross-turbine performance using variations in nozzle position. Crossflow turbine performance with horizontal nozzle position torque and turbine power is lower, and there is an increase in a vertical position. Then, the horizontal and vertical nozzle position is very good because the nozzle is more effective with maximum turbine performance, namely 13.811-watt turbine power 1,099 turbine torque at 120 rpm.
APA, Harvard, Vancouver, ISO, and other styles
3

Rantererung, Corvis L., and Atus Buku. "Comparison of Crossflow Turbine Performance through Nozzle Position Variations Using ANSYS Simulation." International Journal on Advanced Science, Engineering and Information Technology 13, no. 6 (2023): 2361–71. http://dx.doi.org/10.18517/ijaseit.v13i6.19054.

Full text
Abstract:
The performance comparison of Crossflow turbines is greatly influenced by the position of the nozzle in the conversion of water energy into mechanical energy that occurs through the blades, runners, and shafts of Crossflow turbines. The study aims to directly examine the visualization of water fluid dynamics across the turbine runner blade and enhance the performance of the Crossflow turbine by varying the nozzle position. This study intends to investigate the impact of water flow dynamics and emission on the performance of Crossflow turbines with a combined horizontal-vertical nozzle position, specifically focusing on the magnitude of the number of turbine blades driven and the size of the runner blade area. The objective of investigating nozzle position variations in Crossflow turbines is to determine the specific nozzle position at which the turbine blade may efficiently extract maximum energy from the water flow, hence optimizing turbine performance. The research method using models made using CAD software is AutoCAD by exporting to IGES or IGS format to be compatible with ANSYS. The simulation of this research is with post-processing. There are three, namely making animations, making contours, and taking data to compare cross-turbine performance using variations in nozzle position. Crossflow turbine performance with horizontal nozzle position torque and turbine power is lower, and there is an increase in a vertical position. Then, the horizontal and vertical nozzle position is very good because the nozzle is more effective with maximum turbine performance, namely 13.811-watt turbine power 1,099 turbine torque at 120 rpm.
APA, Harvard, Vancouver, ISO, and other styles
4

Dini Oktavitasari, Dominicus Danardono Dwi Prija Tjahjana, and Syamsul Hadi. "Experimental Investigation on The Wake Effect of Crossflow Wind Turbines." Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 85, no. 2 (2021): 44–50. http://dx.doi.org/10.37934/arfmts.85.2.4450.

Full text
Abstract:
An optimal design of an aligned configuration using a vertical axis wind turbine especially a crossflow wind turbine to increase rate and power production is one of the problems in wind energy. In the present work, an experimental investigation is presented to evaluate the impact of the wake effect on the dynamic performance of an aligned configuration and compared characteristics of the crossflow wind turbine for 12 x 12 number of blades. In arrays, the spacing parameters of the crossflow wind turbines were conducted with three different spacings (1D; 2D; and 3D) where a crossflow wind turbine was operating downstream of a co-rotating pair. The crossflow wind turbines arranged in inline configurations. Experiments were carried out in a closed-circuit WT-30 aerodynamic laboratory wind tunnel in a ratio velocity of 7.51 m/s. Measurement data of each wind turbines were reported in terms of dimensionless power coefficient (CP) and torque coefficients (CT) for dynamic performance analysis. The experimental results were aligned configuration spacing and the number of blades affects enhancement aerodynamic performance of the downstream crossflow wind turbines. The best performance turbine spacings in aligned configurations are 3D. Wind flow has a distance to be streamlined.
APA, Harvard, Vancouver, ISO, and other styles
5

Arifin, Zainal, Dominicus Danardono Dwi Prija Tjahjana, Suyitno Suyitno, et al. "Performance of Crossflow Wind Turbines in In-line Configuration and Opposite Rotation Direction." Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 81, no. 1 (2021): 131–39. http://dx.doi.org/10.37934/arfmts.81.1.131139.

Full text
Abstract:
Wind energy sources must be investigated to produce electrical energy from a renewable source. Crossflow wind turbines are suitable for use because they have several advantages such as self-starting ability, low noise, and excellent stability. They have the potential to be applied as small wind turbines in urban districts because of their small maximum coefficient of power (Cp), which is 10% of that of other small wind turbines. To enhance the performance of crossflow wind turbines, we changed the turbine to rotate in the opposite direction in the in-line configuration. Turbine performance testing was tested using a wind tunnel. The characteristics of crossflow wind turbines were investigated, then turbine performance was analyzed and discussed. The maximum power coefficient obtained was 0.169 (Cp) with the configuration of 12 turbine blades at a wind speed of 10 m/s. The maximum torque coefficient obtained was 0.703. The overall results show that the crossflow wind turbine in in-line configuration with opposite rotation can improve the performance of wind turbines.
APA, Harvard, Vancouver, ISO, and other styles
6

Adhikari, Ram, and David Wood. "Computational Analysis of a Double-Nozzle Crossflow Hydroturbine." Energies 11, no. 12 (2018): 3380. http://dx.doi.org/10.3390/en11123380.

Full text
Abstract:
The crossflow turbines commonly used in small hydropower systems have a single nozzle. We are unaware of any studies of double-nozzle crossflow turbines which could have twice the power output of the single-nozzle design by doubling the flow through the same runner, with a high maximum efficiency. We present a computational analysis of a double-nozzle crossflow turbine, to determine the turbine efficiency and fundamental flow patterns. This work was based on a single-nozzle crossflow turbine with a maximum efficiency of 88%, one of the highest reported in the open literature through extensive experimental measurements. Previous numerical studies on this turbine have shown that the water flow in the runner was confined to less than half the runner periphery, implying that the other half could be used to double the runner power output by employing a second nozzle. We show that adding a second, identical nozzle without making any other changes to the design achieves a doubling of the power output. The dual-nozzle turbine, therefore, has the same efficiency as the original turbine. We also investigate the use of a slider to control the flow at part-load and show that part-load efficiency of the double-nozzle is very similar to that of the original turbine. This demonstrates the feasibility of using two nozzles for crossflow turbines.
APA, Harvard, Vancouver, ISO, and other styles
7

Rudy, Sutanto, and . Sujita. "Analysis of Variation in Loading of 26-Blade Crossflow Turbine in Hydroelectric Power Plant on the Torque Generated." Engineering and Technology Journal 9, no. 09 (2024): 5203–5. https://doi.org/10.5281/zenodo.13833510.

Full text
Abstract:
Hydroelectric power plants are one of the alternatives in utilizing renewable energy sources. One of the main components in a hydroelectric power generation system is a water turbine. Water turbines function to convert potential energy into mechanical energy. This study uses a crossflow type water turbine. The choice of crossflow turbines is because the turbine has a low head range so that it does not require large water pressure to rotate the turbine shaft. The purpose of this study was to determine the effect of loading on the crossflow turbine on the torque produced. The methods used in this study were literature studies and experimental studies. The turbine blades used in this study used 26 blades by providing loading starting from the lowest to the maximum load point, namely 1 to 9 kg. The water discharge flowing into the turbine is fixed at 1 m<sup>3</sup>/minute. The results of this study indicate that the increasing load on the turbine, the average turbine rotation decreases by 14.31%. While the turbine torque increased by an average of 24.53%.
APA, Harvard, Vancouver, ISO, and other styles
8

Sritram, Piyawat, and Ratchaphon Suntivarakorn. "The Efficiency Comparison of Hydro Turbines for Micro Power Plant from Free Vortex." Energies 14, no. 23 (2021): 7961. http://dx.doi.org/10.3390/en14237961.

Full text
Abstract:
In this research paper, the relationship between a crossflow turbine and propeller turbine size changes and the pond size in a free vortex power generation system was investigated. This relationship can be written in the form of a new mathematical equation using the principles of the response surface methodology (RSM) method. This study aimed to compare the efficiency of a crossflow turbine and propeller turbine to enhance a micro power plant from free vortex. The pond size in a micro power plant from free vortex was 1 m in diameter and 0.5 m in height with a 0.2 m outlet drain at the bottom. All turbines were tested at different water flowrates of 0.2, 0.3, 0.4, 0.5, and 0.6 m3/s to identify the rpm, water head, voltage, and electric current to access the waterpower, power output, and overall efficiency. At a 0.02 m3/s water flowrate, the crossflow turbine had greater overall efficiency than the propeller turbine, reaching 9.09% efficiency. From the comparison of the results of the two turbines used in the 0.5 m high cylinder-shaped generator pond, the turbine type, turbine size (height and diameter), number of blades, and water flowrate are key factors that affect the overall efficiency. The crossflow turbine can achieve greater efficiency than the propeller turbine in this generator system.
APA, Harvard, Vancouver, ISO, and other styles
9

Culaba, A. B., and I. V. Marfori. "Micro hydro crossflow turbine manufacturing cost analysis using optimization technique." IOP Conference Series: Earth and Environmental Science 1500, no. 1 (2025): 012007. https://doi.org/10.1088/1755-1315/1500/1/012007.

Full text
Abstract:
Abstract Micro hydro crossflow turbines are machines used for the conversion of the kinetic and potential energy of falling water into mechanical energy. It is mainly used for small scale hydro applications of less than 100 kW. It is widely used in community-based power applications owing to its robustness, practicability, acceptable efficiency, and manufacturability. The electro-mechanical component of a micro hydro system gives a significant cost contribution, specifically the turbine component. Due to the simplicity of the crossflow turbine, many micro hydro developers opt to have local shops manufacture these turbines. The paper aims to analyze the manufacturing process of a typical crossflow turbine to accurately predict its cost. The analysis includes different manufacturing techniques and their cost and performance implications for the different parts of the turbine. A parametric three-dimensional model created using computer-aided design application was used to determine the dimensions, cutting length, and welding length of the turbine. The analysis was conducted considering different site-specific scenarios such as low head, medium head, and high head given constant power output. The results show that the cost of the crossflow turbine is significantly affected due to the water flow rate. At a higher water flow rate the crossflow turbine width widens, which significantly affects the machining time. Design changes and machining techniques also affect the cost and the performance of the turbine. An optimization technique was employed to minimize cost by selecting design characteristics that yielded an acceptable performance. The optimized results have shown a cost reduction of at least 20%.
APA, Harvard, Vancouver, ISO, and other styles
10

Marzuki, Marzuki, Ahmad Fauzi Pohan, Trengginas Eka Putra Sutantyo, and Asep Neris Bachtiar. "PEMBANGKIT LISTRIK TENAGA MIKRO HIDRO (PLTMH) MEMANFAATKAN AIR BUANGAN RUMAH TANGGA DI NAGARI SAWAH TANGAH, KECAMATAN PARIANGAN, KABUPATEN TANAH DATAR, SUMATERA BARAT." LOGISTA - Jurnal Ilmiah Pengabdian kepada Masyarakat 5, no. 2 (2021): 151. http://dx.doi.org/10.25077/logista.5.2.151-159.2021.

Full text
Abstract:
Kondisi berbukit dan lokasi sungai yang jauh dari pusat pemukiman pada Nagari Sawah Tangah membuat masyarakat kesulitan untuk mengakses sumber air sebagai kebutuhan pokok maupun untuk irigasi persawahan. Saat ini, sumber mata air yang berlimpah pada Jorong Tuah Sakato, Nagari Sawah Tangah, sebagian telah dialirkan dari lembah yang dalam menuju rumah-rumah warga dan persawahan dengan menggunakan pompa listrik. Namun, hal ini membuat masyarakat memiliki biaya listrik yang besar untuk memenuhi kebutuhan air mereka. Kegiatan pengabdian kepada masyarakat ini bertujuan untuk membantu biaya listrik masyarakat Nagari Sawah Tangah dengan membangun sistem Pembangkit Listrik Tenaga Mikro Hidro (PLTMH) dengan memanfaatkan air buangan yang tidak terpakai. Kegiatan dibagi menjadi beberapa tahapan, yaitu diawali dengan (1) melakukan peninjauan lokasi dan penyuluhan, (2) penentuan lokasi pemasangan dan rancangan pipa dan turbin crossflow, kemudian selanjutnya (3) pembuatan sistem sipil dan mekanik sistem turbin, dan (4) melakukan pengujian efisiensi sistem turbin, serta (5) pembinaan kepada masyarakat. Perbedaan ketinggian antara posisi bendungan dengan turbin crossflow sebesar 15°. Debit air yang melewati pipa menuju turbin mencapai 60 liter/detik. Keberhasilan sistem turbin ini mampu memeroleh daya sekitar 2600 W. Dengan demikian, kegiatan pengabdian ini mampu membuat biaya listrik yang ditanggung oleh masyarakat menjadi lebih murah.&#x0D; Kata kunci: Pembangkit Listrik Tenaga Mikro Hidro (PLTMH), Turbin crossflow, Efisiensi, Jorong tuah sakato, Nagari sawah tangah&#x0D; ABSTRACT&#x0D; The hilly conditions and the location of the river which is far from the center of settlement in Nagari Sawah Tangah make it difficult for the community to access water sources as basic needs and for irrigation of rice fields. Currently, the abundant springs in Jorong Tuah Sakato, Nagari Sawah Tangah, have been partially drained from a deep valley to people's homes and rice fields using electric pumps. However, this leaves the community with large electricity costs to meet their water needs. This community service activity aims to help the electricity costs of the Nagari Sawah Tangah community by building a Micro Hydro Power Plant (PLTMH) system by utilizing unused waste water. The activity is divided into several stages, starting with (1) conducting site inspections and counseling, (2) determining the installation location and design of pipes and crossflow turbines, then (3) making civil and mechanical turbine systems, and (4) conducting testing turbine system efficiency, and (5) community development. The difference in height between the position of the dam and the crossflow turbine is 15°. The flow of water that passes through the pipe to the turbine reaches 60 liters/second. The success of this turbine system is able to obtain a power of about 2600 W. Thus, this service activity is able to make the electricity cost paid by the community cheaper.&#x0D; Keywords: Micro Hydro Power Plant (PLTMH), Crossflow turbine, Efficiency, Jorong tuah sakato, Nagari sawah tangah
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Crossflow turbine"

1

Khaldi, A. "Discharge coefficient of film cooling holes with rounded entries or exits." Thesis, University of Nottingham, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.378758.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Perales, Javier, Gianpierre Zapata, and Carlos Raymundo. "Energy model based on fluvial rainfall for the rural population with torrential rain." Springer Science and Business Media Deutschland GmbH, 2019. http://hdl.handle.net/10757/656264.

Full text
Abstract:
El texto completo de este trabajo no está disponible en el Repositorio Académico UPC por restricciones de la casa editorial donde ha sido publicado.<br>In Latin America, the lack of electricity has been a serious problem for over several years. To overcome this lack of supply in electricity supply, hydraulic energy is now being used in a greater proportion to fulfill the electricity needs in the rural areas. Investigations have been conducted to assess the environmental conditions of these rural areas to optimize the functionality of turbines used for hydraulic energy generation. However, there are very few focused on turbines of less than 0.5 kW generation. The proposed study aims to analyze the positioning of the blades of the cross-flow turbines and designing an electric generation system for rural dwellings. A simulation of each evaluated design was performed, and the power generated from these turbines was calculated. The results show that the power outputs initially were high and stabilized at a value of approximately 180 W, hence satisfying the minimum demands of a rural house.
APA, Harvard, Vancouver, ISO, and other styles
3

Vakil, Sachin Suresh. "Flow and Thermal Field Measurements in a Combustor Simulator Relevant to a Gas Turbine Aero-Engine." Thesis, Virginia Tech, 2002. http://hdl.handle.net/10919/36324.

Full text
Abstract:
<p>The highly competitive gas turbine industry has been motivated by consumer demands for higher power-to-weight ratios, increased thermal efficiencies, and reliability while maintaining affordability. In its continual quest, the industry must continually try to raise the turbine inlet temperature, which according to the well-known Brayton cycle is key to higher engine efficiencies. The desire for increased turbine inlet temperatures creates an extremely harsh environment for the combustor liner in addition to the components downstream of the combustor. Shear layers between the dilution jets and the mainstream, as well as combustor liner film-cooling interactions create a complex mean flow field within the combustor, which is not easy to model. A completely uniform temperature and velocity profile at the combustor exit is desirable from the standpoint of reducing the secondary flows in the turbine. However, this seldom occurs due to a lack of thorough mixing within the combustor. Poor mixing results in non-uniformities, such as hot streaks, and allow non-combusted fuel to exit the combustor. <p>This investigation developed a database documenting the thermal and flow characteristics within a combustor simulator representative of the flowfield within a gas turbine aero-engine. Three- and two-component laser Doppler velocimeter measurements were completed to quantify the flow and turbulence fields, while a thermocouple rake was used to quantify the thermal fields. <p>The measured results show very high turbulence levels due to the dilution flow injection. Directly downstream of the dilution jets, an increased thickness in the film-cooling was noted with a fairly non-homogeneous temperature field across the combustor width. A highly turbulent shear layer was found at the leading edge of the dilution jets. Measurements also showed that a relatively extensive recirculation region existed downstream of the dilution jets. Despite the lack of film-cooling injection at the trailing edge of the dilution hole, there existed coolant flow indicative of a horse-shoe vortex wrapping around the jet. As a result of the dilution jet interaction with the mainstream flow, kidney-shaped thermal fields and counter-rotating vortices developed. These vortices serve to enhance combustor mixing.<br>Master of Science
APA, Harvard, Vancouver, ISO, and other styles
4

Weinzierl, Johannes [Verfasser]. "Large Eddy Simulation of Reacting Jets in Hot Crossflow under Atmospheric and Gas Turbine Conditions / Johannes Weinzierl." München : Verlag Dr. Hut, 2016. http://d-nb.info/1115549391/34.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Keinz, Jan. "Optimization of a Dry Low NOx Micromix Combustor for an Industrial Gas Turbine Using Hydrogen-Rich Syngas Fuel." Doctoral thesis, Universite Libre de Bruxelles, 2018. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/277234.

Full text
Abstract:
Environmentally friendly and efficiently produced energy from sustainable and renewable resources is of great importance. Carbon dioxide (CO2) and nitric oxides (NOx) are the main emissions of air-breathing gas turbines in power plants. Gas turbines of the power generation industry are normally fueled with liquid fuels, natural gas or syngas in changing qualities. Syngas can be produced by gasification processes in IGCC power plants and consist of varying percentages of the main fractions hydrogen (H2) and carbon monoxide (CO). CO2 emissions can be reduced by a decrease of the CO-share and an increase of the hydrogen-share in the syngas fuel, and by using pre-combustion carbon capture and sequestration (CCS) technology. For low NOx, current gas turbine combustion chamber technologies require diluents, a rather low H2 content and modifications of the combustor hardware. A feasible solution for low NOx hydrogen and syngas combustion in gas turbines is the Micromix principle developed at Aachen University of Applied Sciences. The goal of this doctoral thesis is the research on a Micromix combustor with increased power densities fueled with hydrogen-rich syngas with about 90% by volume hydrogen, and going up to 100% hydrogen in the fuel. Test burner experiments are used to characterize the combustion and emission properties of a multitude of key drivers. Based on this optimization with a variety of scaled model test burners, a prototype dual-fuel hydrogen/syngas Micromix combustor is designed and integrated into the annular combustion chamber of an industrial gas turbine. In the gas turbine, the performance characteristics of the prototype-combustor are investigated under real operational conditions with hydrogen-rich syngas and pure hydrogen.<br>Doctorat en Sciences de l'ingénieur et technologie<br>info:eu-repo/semantics/nonPublished
APA, Harvard, Vancouver, ISO, and other styles
6

Johnson, Perry L. "Toward increasing performance and efficiency in gas turbines for power generation and aero-propulsion unsteady simulation of angled discrete-injection coolant in a hot gas path crossflow." Honors in the Major Thesis, University of Central Florida, 2011. http://digital.library.ucf.edu/cdm/ref/collection/ETH/id/444.

Full text
Abstract:
This thesis describes the numerical predictions of turbine film cooling interactions using Large Eddy Simulations. In most engineering industrial applications, the Reynolds-Averaged Navier-Stokes equations, usually paired with two-equation models such as k-Greek lowercase letter epsilon] or k-Greek lowercase letter omega], are utilized as an inexpensive method for modeling complex turbulent flows. By resolving the larger, more influential scale of turbulent eddies, the Large Eddy Simulation has been shown to yield a significant increase in accuracy over traditional two-equation RANS models for many engineering flows. In addition, Large Eddy Simulations provide insight into the unsteady characteristics and coherent vortex structures of turbulent flows. Discrete hole film cooling is a jet-in-cross-flow phenomenon, which is known to produce complex turbulent interactions and vortex structures. For this reason, the present study investigates the influence of these jet-crossflow interactions in a time-resolved unsteady simulation. Because of the broad spectrum of length scales present in moderate and high Reynolds number flows, such as the present topic, the high computational cost of Direct Numerical Simulation was excluded from possibility.<br>B.S.M.E.<br>Bachelors<br>Engineering and Computer Science<br>Mechanical Engineering
APA, Harvard, Vancouver, ISO, and other styles
7

Florenciano, Merino Juan Luis. "Étude de la réponse d'un écoulement avec transfert pariétal de masse à un forçage acoustique : application au refroidissement des chambres de combustion aéronautiques." Thesis, Pau, 2013. http://www.theses.fr/2013PAUU3013/document.

Full text
Abstract:
L’étude présentée dans cette thèse relève de la mécanique des fluides expérimentale et numérique appliquée aux écoulements pariétaux de refroidissement de chambres de combustion aéronautiques. En présence de phénomènes thermo-acoustiques, comme les instabilités de combustion, il est important d’évaluer si les capacités de l’écoulement pariétal à protéger les parois de chambre restent suffisantes. C’est ainsi que nous nous sommes intéressés aux écoulements de paroi multiperforée soumis à une excitation acoustique. Dans ce but, le banc d’essais MAVERIC a été amélioré grâce à l’installation d’un système qui permet de forcer acoustiquement l’écoulement transverse dans lequel les jets pariétaux débouchent. Nous avons pu alors mettre en évidence la forte sensibilité de ce type d’écoulements à l’excitation acoustique. Le bon accord entre les résultats expérimentaux et les simulations numériques aux grandes échelles (LES) effectuées est très encourageant dans le cas d’un forçage par onde stationnaire. Le forçage par onde progressive, étudié uniquement par simulations numériques, s’est révélé être capable de modifier significativement la topologie de l’écoulement. Enfin, à partir de l’outil numérique AVBP-AVTP qui permet le couplage de calculs fluide-solide, nous avons réalisé une étude de l’influence de la présence d’une excitation acoustique sur le comportement thermique de l’écoulement autour d’une paroi multiperforée de chambre de combustion<br>This experimental and numerical study in the field of fluid mechanics deals with jets-in cross flow configurations that are relevant for the cooling of aero engine combustion chambers. Indeed, in presence of instabilities it is important to determine to which extent the film cooling is able to do its job of preserving the combustion chamber walls from the thermal load. The test facility MAVERIC has been upgraded in order to acoustically force the crossflow in which the jets are discharging. The strong sensitivity of the overall flow unsteady properties to the presence of the acoustic forcing has been clearly evidenced. The agreement between the experimental results and large-eddy simulations proved to be quite encouraging for a stationary acoustic wave whereas the case of a propagating acoustic wave investigated only numerically reveals also quite a significant change of the flow topology. In this context, the effect of the acoustic forcing on the wall thermal behavior has been analyzed thanks to the use of the fluid-solid coupled AVBP-AVTP solver
APA, Harvard, Vancouver, ISO, and other styles
8

Klavetter, Sean Robert. "Internal crossflow effects on turbine airfoil film cooling adiabatic effectiveness with compound angle round holes." Thesis, 2014. http://hdl.handle.net/2152/26324.

Full text
Abstract:
Internal crossflow is an important element to actual gas turbine blade cooling; however, there are very few studies in open literature that have documented its effects on turbine blade film cooling. Experiments measuring adiabatic effectiveness were conducted to investigate the effects of perpendicular crossflow on a row of 45 degree compound angle, cylindrical film cooling holes. Tests included a standard plenum condition, a baseline crossflow case consisting of a smooth-walled channel, and various crossflow configurations with ribs. The ribs were angled to the direction of prevailing internal crossflow at 45 and 135 degrees and were positioned at different locations. Experiments were conducted at a density ratio of DR=1.5 for a range of blowing ratios including M=0.5, 0.75, 1.0, 1.5, and 2.0. Results showed that internal crossflow can significantly influence adiabatic effectiveness when compared to the standard plenum condition. The implementation of ribs generally decreased the adiabatic effectiveness when compared to the smooth-walled crossflow case. The highest adiabatic effectiveness measurements were recorded for the smooth-walled case in which crossflow was directed against the spanwise hole orientation angle. Tests indicated that the direction of perpendicular crossflow in relation to the hole orientation can significantly influence the adiabatic effectiveness. Among the rib crossflow tests, rib configurations that directed the coolant forward in the direction of the mainstream resulted in higher adiabatic effectiveness measurements. However, no other parameters could consistently be identified correlating to increased film cooling performance. It is likely that a combination of factors are responsible for influencing performance, including internal local pressure caused by the ribs, the internal channel flow field, jet exit velocity profiles, and in-hole vortices.<br>text
APA, Harvard, Vancouver, ISO, and other styles
9

Yeh, Chun-Lang, and 葉俊郎. "Numerical Investigation of the Mixing Between Lateral Jets and Swirling Crossflow in Contoured-Wall Gas Turbine Combustors." Thesis, 1993. http://ndltd.ncl.edu.tw/handle/38194644998922016368.

Full text
Abstract:
博士<br>國立成功大學<br>航空太空工程學系<br>81<br>The major objective of this dissertation is to investigate numerically the mixing between lateral jets and swirling crossflow within a contoured-wall gas turbine combustor. The flow pattern of interest here necessitates the solution of 3-D elliptic partial differential equations. These equations describe the flowfield of turbulent reacting multicomponent gas mixtures, in which heat, mass, and momentum transfers take place simultaneously. Since the contoured-wall combustors have complex geometries, the curvilinear coordinate system is employed. With respect to the physical models, the standard k- ε model and the fast chemistry model with assumed PDF are adopted. To facilitate the development of the present computational model, some basic 3-D laminar flow problems as
APA, Harvard, Vancouver, ISO, and other styles
10

Sinha, Anubhav. "Experimental and Numerical Studies on Spray in Crossflow." Thesis, 2016. http://etd.iisc.ac.in/handle/2005/3058.

Full text
Abstract:
The phenomenon of spray in crossflow is of relevance in gas turbine combustor development. The current work focuses on spray in crossflow rather than liquid jet in crossflow from the standpoint of enhancing fuel dispersion and mixing. Specifically, the first part of the work involves study of spray structure, droplet sizing, and velocimetry for sprays of water and ethanol in a crossflow under ambient conditions. Laser-based diagnostic techniques such as Particle/Droplet Image Analysis (PDIA) and Particle Tracking Velocimetry (PTV) are utilized. Using spray structure images, trajectory equations are derived by multi-variable regression. It is found that the spray trajectory depends only on the two-phase momentum ratio and is independent of other flow parameters. A generalized correlation for the spray trajectory is proposed incorporating the liquid surface tension, which is found to be effective for our data, with water and ethanol, as well as data on Jet-A from the literature for a wide variety of operating conditions. An interesting phenomenon of spatial bifurcation of the spray is observed at low Gas-to-Liquid ratios (GLRs). The reason for this phenomenon is attributed to the co-existence of large and highly deformed ligaments along with much smaller droplets at low GLR conditions. The smaller droplets lose their vertical momentum rapidly leading to lower penetration, whereas the larger ligaments/droplets penetrate much more due to their larger momentum leading to a spatial separation of the two streams. The second part of the study focuses on evaporating sprays in preheated crossflow. Experiments are conducted using ethanol, decane, Jet-A1 fuel, and a two-component surrogate for Jet-A1 fuel. The crossflow air is heated up to 418 K and the effect of evaporation is studied on spray trajectory and droplet sizes. Measured droplet sizes and velocities at two successive locations are used to estimate droplet evaporation lifetimes. Evaporation constant for the d2 law derived from the droplet lifetimes represents the first-ever data for the above-mentioned liquids under forced convective conditions. This data can be used to validate multi-component droplet evaporation models. The last part of the study focuses on Large Eddy Simulations (LES) of the spray in crossflow. The near-nozzle spray structure is investigated experimentally to obtain droplet size and velocity distributions that are used as inputs to the computational model. For the spray in crossflow under ambient conditions, trajectory and droplet sizes at different locations are compared with experimental results. While the predicted trajectory is found to be in good agreement with data, the predicted droplet sizes are larger than the measured values. This is attributed to the implicit assumption in the secondary breakup model that the droplets are spherical, whereas the experimental data in the near-nozzle region clearly shows presence of mostly ligaments and non-spherical droplets, especially for the low GLR cases. A modified breakup model is found to lead to improved agreement in droplet sizes between predictions and measurements. Overall, the experiments and computations have provided significant insight into spray in crossflow phenomenon, and have yielded useful results in terms of validated spray trajectory correlations, droplet evaporation lifetimes under forced convective conditions, and a methodology for simulation of airblast sprays.
APA, Harvard, Vancouver, ISO, and other styles

Books on the topic "Crossflow turbine"

1

Sumanta, Acharya, Lewis Research Center, and United States. National Aeronautics and Space Administration., eds. Dynamics of large-scale structures for jets in crossflow. National Aeronautics and Space Administration, Lewis Research Center, 1998.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
2

Sumanta, Acharya, Lewis Research Center, and United States. National Aeronautics and Space Administration., eds. Dynamics of large-scale structures for jets in crossflow. National Aeronautics and Space Administration, Lewis Research Center, 1998.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
3

Sumanta, Acharya, and Lewis Research Center, eds. Dynamics of large-scale structures for jets in crossflow. National Aeronautics and Space Administration, Lewis Research Center, 1998.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
4

Sumanta, Acharya, Lewis Research Center, and United States. National Aeronautics and Space Administration., eds. Dynamics of large-scale structures for jets in crossflow. National Aeronautics and Space Administration, Lewis Research Center, 1998.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
5

Holdeman, J. D. Mixing of multiple jets with a confined subsonic crossflow. National Aeronautics and Space Administration, 1997.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
6

E, Smith C., Holdeman J. D, and United States. National Aeronautics and Space Administration., eds. Jet mixing and emission characteristics of transverse jets in annular and cylindrical confined crossflow. National Aeronautics and Space Administration, 1995.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
7

S, Samuelsen G., and United States. National Aeronautics and Space Administration., eds. Atomization and dispersion of a liquid jet injected into a crossflow of air: Under grant NAG3-1124. National Aeronautics and Space Administration, 1996.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
8

Center, Lewis Research, ed. Mixing of multiple jets with a confined subsonic crossflow: Summary of NASA-supported experiments and modeling. National Aeronautics and Space Administration, Lewis Research Center, 1991.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
9

S, Samuelsen G., Holdeman J. D, and United States. National Aeronautics and Space Administration., eds. Jet mixing in a reacting cylindrical crossflow. National Aeronautics and Space Administration, 1995.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
10

S, Samuelsen G., Holdeman J. D, and United States. National Aeronautics and Space Administration., eds. Jet mixing in a reacting cylindrical crossflow. National Aeronautics and Space Administration, 1995.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Book chapters on the topic "Crossflow turbine"

1

Adiwibowo, Priyo Heru, Soeryanto Soeryanto, Wahyu Dwi Kurniawan, and I. Made Arsana. "Crossflow Hydro Turbine with the Interference Blade Improve Turbine Performance." In Proceedings of the International Joint Conference on Science and Engineering 2022 (IJCSE 2022). Atlantis Press International BV, 2022. http://dx.doi.org/10.2991/978-94-6463-100-5_20.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Kastawan, I. Made Wiwit, Rusmana Rusmana, and Aditya Rahman. "Power Generation Characteristics of a Crossflow Turbine and a Single Shaft Coupled of Two Crossflow Turbines." In Atlantis Highlights in Engineering. Atlantis Press International BV, 2023. http://dx.doi.org/10.2991/978-94-6463-118-0_19.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Harvey, Adam. "11. Crossflow Turbines; Reaction Turbines; The Francis Turbine; The Propeller Turbine and Kaplan; Draught Tubes; Reverse Pumps." In Micro-Hydro Design Manual. Practical Action Publishing, 1993. http://dx.doi.org/10.3362/9781780445472.011.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Müller, Sibylle D., and Petros Koumoutsakos. "Control of Micromixers, Jets, and Turbine Cooling using Evolution Strategies." In Manipulation and Control of Jets in Crossflow. Springer Vienna, 2003. http://dx.doi.org/10.1007/978-3-7091-2792-6_11.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Suhaimi, M. A., E. Mat Tokit, F. A. Z. M. Sa’at, et al. "Behavioral Velocity Analysis in Preliminary Design of Crossflow Turbine." In Lecture Notes in Mechanical Engineering. Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-0106-3_81.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Crossflow turbine"

1

Hay, N., D. Lampard, and A. Khaldi. "The Coefficient of Discharge of 30° Inclined Film Cooling Holes With Rounded Entries or Exits." In ASME 1994 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1994. http://dx.doi.org/10.1115/94-gt-180.

Full text
Abstract:
The coefficients of discharge of 30° inclined holes having a length to diameter ratio of 6, and rounded entries or exits have been measured for a range of crossflow conditions. The rounding radius varied from 0 to 1 hole diameters, and the crossflow Mach numbers from 0 to 0.5. Rounding the hole inlet was found to be beneficial, with increases of up to 15% being obtained at high coolant (inlet) side crossflow Mach numbers. Rounding the exit produced no significant benefit. The crossflow effects have been correlated using inlet and outlet additive loss coefficients. These reflect the changes in pressure drop across the hole necessary to maintain the hole mass flow rate when crossflows are applied. The correlated data have been incorporated in a computer program which gives good predictions of discharge coefficient in the presence of either a coolant crossflow or a mainstream crossflow or both.
APA, Harvard, Vancouver, ISO, and other styles
2

He, Guangbin, Yanhu Guo, Andrew T. Hsu, A. Brankovic, S. Syed, and N. S. Liu. "The Effect of Schmidt Number on Turbulent Scalar Mixing in a Jet-in-Crossflow." In ASME 1999 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/99-gt-137.

Full text
Abstract:
The adequacy and accuracy of the constant Schmidt number assumption in predicting turbulent scalar fields in jet-in-crossflows are assessed in the present work. A round jet injected into a confined crossflow in a rectangular tunnel has been simulated using the Reynolds-Averaged Navier-Stokes equations coupled with the standard k-ε turbulence model. A semi-analytical qualitative analysis was made to guide the selection of Schmidt number values. A series of parametric studies were performed, and Schmidt numbers ranging from 0.2 to 1.5 and jet-to-crossflow momentum flux ratios from 8 to 72 were tested. The principal observation is that the Schmidt number does not have an appreciable effect on the species penetration, but it does have a significant effect on species spreading rate in jet-in-crossflows, especially for the cases where the jet-to-crossflow momentum flux ratios are relatively small. A Schmidt number of 0.2 is recommended for best agreement with data. The limitations of the standard k–ε turbulence model and the constant Schmidt number assumption are discussed.
APA, Harvard, Vancouver, ISO, and other styles
3

Gritsch, M., A. Schulz, and S. Wittig. "Discharge Coefficient Measurements of Film-Cooling Holes With Expanded Exits." In ASME 1997 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/97-gt-165.

Full text
Abstract:
This paper presents the discharge coefficients of three film-cooling hole geometries tested over a wide range of flow conditions. The hole geometries include a cylindrical hole and two holes with a diffuser shaped exit portion (i.e. a fanshaped and a laidback fanshaped hole). The flow conditions considered were the crossflow Mach number at the hole entrance side (up to 0.6), the crossflow Mach number at the hole exit side (up to 1.2), and the pressure ratio across the hole (up to 2). The results show that the discharge coefficient for all geometries tested strongly depends on the flow conditions (crossflows at hole inlet and exit, and pressure ratio). The discharge coefficient of both expanded holes was found to be higher than of the cylindrical hole, particularly at low pressure ratios and with a hole entrance side crossflow applied. The effect of the additional layback on the discharge coefficient is negligible.
APA, Harvard, Vancouver, ISO, and other styles
4

Song, Jinkwan, Chandrasekar Ramasubramanian, and Jong Guen Lee. "Response of Liquid Jet to Modulated Crossflow." In ASME Turbo Expo 2013: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/gt2013-95726.

Full text
Abstract:
Experimental results on the response of spray formed by the liquid (Jet-A) jet injection into a crossflow (Air) is presented with a special emphasis on its response to the modulating crossflow. The pressure of the chamber is up to 3.5 atm and the corresponding Weber number is up to 510. The spray of a liquid jet for steady and oscillating crossflow is characterized. The flow field at the injector location in the crossflow direction is determined using PIV (Particle Image Velocimetry) for oscillating as well as steady crossflow case. Planar Mie-scattering measurement is used to characterize the response of spray formed under oscillating crossflow and supplementary phase-averaged PDPA measurements are used to understand the response behavior. The global response of spray to the oscillating crossflow is characterized using the planar Mie-scattering imaging. It shows that there exist very little differences in the heights of the maximum-pixel intensity trajectory for the non-oscillating and oscillating crossflow conditions and the trajectory under oscillating crossflow is lower than that of steady crossflow, suggesting the oscillating crossflow affects the atomization (i.e. the oscillating crossflow enhances atomization process, results in smaller droplets and penetrates less transversely). The response of spray to the oscillating crossflow characterized in terms of the spray transfer function (STF) shows that the gain of the STF increases linearly (at least monotonically) as the liquid-air momentum flux ratio increases but does not change as much with respect to the change of the Weber number for a fixed liquid-air momentum flux ratio. This also indicates that the liquid jet atomization under oscillating crossflow is enhanced much more with the increase of liquid-air momentum flux ratio than with the increase of Weber number. The phase-averaged PDPA measurements confirm that the oscillating crossflow indeed enhances the atomization process in that the oscillating crossflow results in relatively greater number of smaller droplets and the mean droplet size.
APA, Harvard, Vancouver, ISO, and other styles
5

Mondal, Sudeepta, and Achintya Mukhopadhyay. "Numerical Simulation of Inclined Injection of Polydisperse Polykinetic Spray in a Crossflow Using Quadrature Method of Moments." In ASME 2014 Gas Turbine India Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/gtindia2014-8209.

Full text
Abstract:
Liquid fuel is introduced as spray into a gaseous crossflow in many combustion applications like afterburners in gas turbines, ramjet and scramjet combustors. The transport phenomenon of a polydisperse polykinetic spray injected with an inclination in a crossflow has been analysed using Quadrature Method of Moments. Providing an inclination angle to the spray has been accompanied with a more or less uniform distribution of particles, unlike a distinct segregation of larger and smaller diameter particles as observed in the case of vertical injection. The upstream inclined injection in the crossflow yielded a region of stagnation of particles, irrespective of their sizes. This region corresponds to the location where the spray particles equilibrate with the crossflow, whereby they lose their momentum and are swept away by the carrier phase. The downstream injection, on the other hand, showed distinct horizontal and vertical size-based segregation along with regions of accumulation of particles.
APA, Harvard, Vancouver, ISO, and other styles
6

Song, Jinkwan, and Jong Guen Lee. "Characterization of Spray Formed by Liquid Jet Injected Into Oscillating Air Crossflow." In ASME Turbo Expo 2015: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/gt2015-43726.

Full text
Abstract:
This paper presents experimental results on the characteristics of spray formed by a liquid (Jet-A) jet injected into an oscillating air crossflow. Ambient air pressure is raised up to 15.86 bar, and the corresponding aerodynamic Weber number and liquid-air momentum flux ratio are up to 1000 and 25, respectively. The level of modulated crossflow velocity is kept up to 20% of its mean value. For limited cases, the air crossflow is preheated. Planar Mie-scattering measurements are utilized to visualize changes of the spray penetration and cross-sectional spray area in the oscillating air crossflow, and PDPA measurements are used to measure the mean drop size and drop size distribution. Phase-synchronized PDPA measurement of droplet size under the modulation of crossflow shows that the modulating crossflow results in preferentially larger amount of smaller and bigger droplets than average-sized droplets. Global spray response of spray to modulating crossflow is characterized by using proper orthogonal decomposition (POD) analysis of Mie-scattering images and collecting (and hence determining gain of) Mie-scattering intensity of droplets at a fixed downstream distance. It is found that the dominant behavior of the spray is convective oscillation in the axial direction and the change of vertical penetration of the spray is almost negligible for the level of crossflow velocity modulation up to 20%. The gain of Mie-scattering intensity with respect to crossflow velocity modulation level gradually decreases as liquid-air momentum flux ratio increases. Also, per given momentum flux ratio and Weber number, the gain hardly varies with respect to crossflow modulation level, suggesting the response of spray increases in proportion to crossflow velocity modulation level.
APA, Harvard, Vancouver, ISO, and other styles
7

Keawsuntia, Yuttachai. "Electricity generation from micro hydro turbine: A case study of crossflow turbine." In 2011 International Conference & Utility Exhibition on Power and Energy Systems: Issues and Prospects for Asia (ICUE). IEEE, 2011. http://dx.doi.org/10.1109/icuepes.2011.6497731.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Jain, Mohit, Gaurav Tomar, R. V. Ravikrishna, Surya Prakash R., and B. N. Raghunandan. "Numerical Simulations of Liquid Jet Break Up in a Crossflow." In ASME 2013 Gas Turbine India Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/gtindia2013-3690.

Full text
Abstract:
Atomization is the process of disintegration of a liquid jet into ligaments and subsequently into smaller droplets. A liquid jet injected from a circular orifice into cross flow of air undergoes atomization primarily due to the interaction of the two phases rather than an intrinsic break up. Direct numerical simulation of this process resolving the finest droplets is computationally very expensive and impractical. In the present study, we resort to multiscale modelling to reduce the computational cost. The primary break up of the liquid jet is simulated using Gerris, an open source code, which employs Volume-of-Fluid (VOF) algorithm. The smallest droplets formed during primary atomization are modeled as Lagrangian particles. This one-way coupling approach is validated with the help of the simple test case of tracking a particle in a Taylor-Green vortex. The temporal evolution of the liquid jet forming the spray is captured and the flattening of the cylindrical liquid column prior to breakup is observed. The size distribution of the resultant droplets is presented at different distances downstream from the location of injection and their spatial evolution is analyzed.
APA, Harvard, Vancouver, ISO, and other styles
9

Fawcett, Richard J., Andrew P. S. Wheeler, Li He, and Rupert Taylor. "Experimental Investigation Into the Impact of Crossflow on the Coherent Unsteadiness Within Film Cooling Flows." In ASME 2011 Turbo Expo: Turbine Technical Conference and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/gt2011-45376.

Full text
Abstract:
It is known that the mixing of a film cooling flow with the main turbine passage flow is an unsteady process, with coherent unsteady features occurring across a range of blowing ratios. Upon an aero engine the cooling holes on a turbine blade commonly have a crossflow at the hole inlet. Previous work has shown that crossflow at the hole inlet modifies the time-mean flowfield downstream of a cooling hole compared to the case without crossflow. The current paper investigates the impact of spanwise orientated crossflow on the coherent unsteadiness within film cooling flows. Both cylindrical and fan-shaped holes, located on a blade pressure surface, are studied. The range of blowing ratios considered is 0.7 to 1.8 and the crossflow velocity is up to 0.8 times the bulk jet velocity. High Speed Photography and Hot Wire Anemometry are used to observe the presence of coherent unsteadiness, both immediately downstream of the hole exit and within the cooling hole tube. The results show that the coherent unsteadiness downstream of the hole exit is persistent and its occurrence is not significantly affected by the magnitude of spanwise crossflow. Within the cooling hole tube the existence of coherent unsteadiness is presented for the first time, inside both cylindrical and fan-shaped holes, with a Strouhal number of 0.6 to 0.8. The pattern of this in-hole coherent unsteadiness is seen to change with increasing the crossflow velocity.
APA, Harvard, Vancouver, ISO, and other styles
10

Levy, Yeshayahou, Arvind G. Rao, V. Erenburg, V. Sherbaum, I. Gaissinski, and V. Krapp. "Pressure Losses for Jet Array Impingement With Crossflow." In ASME Turbo Expo 2012: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/gt2012-68386.

Full text
Abstract:
Jet impingement is an efficient heat transfer method and has been used successfully in cooling of turbine blades in gas turbine engines. Although many studies have been conducted on the heat transfer characteristics of jet impingement array, there is a lack of knowledge in pressure drop characteristics of large jet impingement arrays. The pressure losses encountered are becoming increasingly important when applied to micro gas turbines, cooling concentrated solar panels and high density electronic chips. The present work focuses on experimental and theoretical investigation of pressure losses in low Re impingement arrays, 200&lt; Re &lt;3000. Experiments were carried out on jet impingement array with nozzle diameters of 200 to 800 μm. Numerical simulations were also performed with available commercial CFD tools. Reasonable comparisons between experimental results and numerical simulations were obtained. Detailed flow structure, mass flow rate distribution, jet velocity profiles, and pressure drop within the array in the streamwise direction were obtained from the CFD simulations. These simulations enhance the understanding of the physics within multiple jet impingement system. Additionally a semi empirical–analytical method is developed for calculating the total pressure loss within a multi jet impingement system. This simple methodology can provide a quick estimate of the total pressure drop and hence is suited for first order optimization. The methodology is validated by results obtained from experiments and from CFD simulations.
APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "Crossflow turbine"

1

Wosnik, Martin, Pete Bachant, Vincent Sinclair Neary, and Andrew W. Murphy. Evaluation of Design & Analysis Code, CACTUS, for Predicting Crossflow Hydrokinetic Turbine Performance. Office of Scientific and Technical Information (OSTI), 2016. http://dx.doi.org/10.2172/1431494.

Full text
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Crossflow turbine' for particular source types:
Journal articles Books
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography