Relevant bibliographies by topics / Turbina cross-flow

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

Academic literature on the topic 'Turbina cross-flow'

Author: Grafiati
Published: 4 June 2021
Last updated: 11 February 2022

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Journal articles on the topic "Turbina cross-flow"

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Cha, Chun Loon, and Sang Soon Hwang. "Numerical Study on Combustion Characteristics of Hydrogen Gas Turbine Combustor using Cross flow Micro-mix System." Journal of The Korean Society of Combustion 24, no. 3 (September 30, 2019): 17–25. http://dx.doi.org/10.15231/jksc.2019.24.3.017.

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Khosrowpanah, Shahram, A. A. Fiuzat, and Maurice L. Albertson. "Experimental Study of Cross‐Flow Turbine." Journal of Hydraulic Engineering 114, no. 3 (March 1988): 299–314. http://dx.doi.org/10.1061/(asce)0733-9429(1988)114:3(299).

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Purwantono, Purwantono, Ahmad Halim Sidiq, Irzal Irzal, and Refdinal Refdinal. "Numerical Analysis of Fluid Flow on Cross Flow and Kaplan Turbine Prototype." Teknomekanik 1, no. 2 (December 16, 2018): 43–47. http://dx.doi.org/10.24036/tm.v2i1.1972.

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Based on previous research conducted by Purwantono about the utilization of exhaust flow from a conventional cross-flow turbine prototype that was used as an inlet of tubin Kaplan [1]. This research was carried out to see how the exhaust flow velocity of each tubin before and after was combined into one combination turbine. This numerical based study uses the Ansys 18.0 application by inputting a 3D design from a conventional turbine prototype which was used as the material for this study. The results obtained in this study show the average of outlet velocity in the Kaplan turbine that uses a velocity outlet from a cross flow turbine of 0.3 m / s greater when it is combined, which is 8.33 m / s and after being combined to 0.38 m / s. The results of this study are expected to contribute to the development of conventional turbines later
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Li, Yan Rong, Yasuyuki Nishi, Terumi Inagaki, and Kentarou Hatano. "Study on the Flow Field of an Undershot Cross-Flow Water Turbine." Applied Mechanics and Materials 620 (August 2014): 285–91. http://dx.doi.org/10.4028/www.scientific.net/amm.620.285.

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The purpose of this investigation is to research and develop a new type water turbine, which is appropriate for low-head open channel, in order to effectively utilize the unexploited hydropower energy of small river or agricultural waterway. The application of placing cross-flow runner into open channel as an undershot water turbine has been under consideration. As a result, a significant simplification was realized by removing the casings. However, flow field in the undershot cross-flow water turbine are complex movements with free surface. This means that the water depth around the runner changes with the variation in the rotation speed, and the flow field itself is complex and changing with time. Thus it is necessary to make clear the flow field around the water turbine with free surface, in order to improve the performance of this type turbine. In this research, the performance of the developed water turbine was determined and the flow field was visualized using particle image velocimetry (PIV) technique. The experimental results show that, the water depth between the outer and inner circumferences of the runner decreases as the rotation speed increases. In addition, the fixed-point velocities with different angles at the inlet and outlet regions of the first and second stages were extracted.
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TOYOKURA, Tomitaro, Toshiaki KANEMOTO, Toshiaki SUZUKI, and Tetsu SATO. "Studies on cross-flow turbines." Transactions of the Japan Society of Mechanical Engineers Series B 51, no. 461 (1985): 143–51. http://dx.doi.org/10.1299/kikaib.51.143.

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Strom, B., S. L. Brunton, and B. Polagye. "Advanced control methods for cross-flow turbines." International Marine Energy Journal 1, no. 2 (Nov) (November 1, 2018): 129–38. http://dx.doi.org/10.36688/imej.1.129-138.

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Cross-flow turbines have a number of potential advantages for hydrokinetic energy applications. Two novel control schemes for improving cross-flow turbine energy conversion are introduced and demonstrated through scale experiments. The first aims to alter the local flow conditions on the blades through varying blade kinematics as a function of rotational position, thus increasing beneficial fluid forcing. An established method accomplishes this by oscillating the mounting angle of the blade. Instead we proposed to vary the angular velocity of the blade as a function of azimuthal position. Optimizing this controller resulted in a 59% increase in turbine performance over standard controllers. The second control scheme operates an array of two turbines in a coordinated manner to take advantage of periodic wake structures. For a range of relative turbine positions, a parent controller maintains a constant blade position difference between turbines with the same angular velocity. For select positions, the array efficiency is shown to be greater than that of a single turbine. At the optimal position, coordinated control results in a 4% increase in array performance over uncoordinated operation. Finally, intracycle angular velocity and coordinated control schema are combined.
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Sutikno, Djoko, Rudy Soenoko, Sudjito Soeparman, and Slamet Wahyudi. "Experimental Study of the Cross Flow Turbine." Applied Mechanics and Materials 836 (June 2016): 304–7. http://dx.doi.org/10.4028/www.scientific.net/amm.836.304.

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The experimental study was intended to investigate characteristics of the cross flow turbine based to the three models designed on the same runner diameter with different runner length of each. The Flow rates were measured by magnetic flow meter, the forces were detected by using spring balance and turbine speeds were detected by tachometer. The performance characteristics are shown by the relation of Power and efficiency versus jet entry arc, as well as the relation of Power and efficiency versus ratio between diameter and width of runner. The study indicated that the efficiency of the models were slightly difference, the highest efficiency indicated by the turbine with the ratio between length of runner and the diameter of the runner was 2; It was corresponding to the 75 degree entry arc.
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GOTO, Mirei, Hirokazu YAMAMOTO, Shouichiro IIO, and Yoshiaki HANEDA. "Internal Flow and Performance of Cross-flow Hydraulic Turbine." Proceedings of Conference of Hokuriku-Shinetsu Branch 2018.55 (2018): E013. http://dx.doi.org/10.1299/jsmehs.2018.55.e013.

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Aditya Sardjono, Joshua, Steven Darmawan, and Harto Tanujaya. "Flow investigation of cross-flow turbine using CFD method." IOP Conference Series: Materials Science and Engineering 1007 (December 31, 2020): 012035. http://dx.doi.org/10.1088/1757-899x/1007/1/012035.

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Gómez, Vanessa Ruiz, Edison A. Palacio Higuita, and Aldo Germán Benavides Morán. "Computational analysis of a cross flow turbine performance." MATEC Web of Conferences 240 (2018): 03011. http://dx.doi.org/10.1051/matecconf/201824003011.

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In the electrical energy generation context in Colombia, the water resources represent the 64% of the potential generated according to UPME in the 2015 year; becoming into a solution to the growing energy demand and to the supply of energy in non-interconnected zones. The cross-flow turbines as Michell-Banki type, become an efficient and economically attractive choice. This paper shows the fluiddynamic performance of a laboratory’s model turbine under several operating conditions. The development of this analysis is supported by the results of experimental tests, uses the computational fluid dynamics as a tool for modelling, estimate, and analyse the turbine behaviour under different operating conditions, with ANSYS-Fluent software; the computational model considers the most important geometric aspects of the turbine and the opening percentage effect of the guide blade. The water flow through the rotor is approach through a turbulence model as κ – ε type. The numerical study results agree satisfactorily with the turbine performance observed in the laboratory.
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Dissertations / Theses on the topic "Turbina cross-flow"

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Junior, Antonio Gonçalves de Mello. "A Turbina de Fluxo (Michell-Banki) como Opção para Centrais Hidráulicas de Pequeno Porte." Universidade de São Paulo, 2000. http://www.teses.usp.br/teses/disponiveis/86/86131/tde-15052013-144737/.

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Estima-se que nos próximos 20 anos a energia hidráulica contribuirá com quase 30% da energia elétrica do planeta, atualmente esta participação é de 19%. Muitos países possuem iniciativas sérias de implementação de Pequenas Centrais Hidrelétricas, quer seja a médio ou a longo prazo. No Brasil, particularmente, um novo programa de incentivo as pequenas centrais hidrelétricas está sendo lançado pela ELETROBRÁS. Porém, a previsão do número de usinas de pequeno porte e a potência total a ser instalada dentro do plano decenal, 1997 2006, de geração é relativamente pequeno (15 PCH somando 93,71 MW de possíveis 2.161 totalizando 3.633 MW Fonte: SIPOT- ELETROBRÁS abr / 98). A média do consumo de energia elétrica por habitante no Brasil está abaixo da média do consumo mundial (1805 kWh/ano para 2160 kWh/ano. (Fontes: SIESE-Síntese anual 1999 e International Energy Outlook 1998 DOE / EIA). Quando comparamos as várias regiões do território brasileiro a discrepância se torna ainda maior. Vários tipos de turbinas hidráulicas podem ser usadas em pequenas, mini e micro centrais hidroelétricas, entre as quais podemos destacar: Pelton, Francis, Turgo, Kaplan, Hélice, Banki etc. No Brasil as mais utilizadas são: Francis e Kaplan seguidas de longe pela Pelton. O uso dos demais tipos é quase que desconhecido, principalmente a Turgo. A turbina de fluxo cruzado, também conhecida pelos nomes de: MichellBanki, Banki e MichellOssberger é definida como uma turbina de ação que pode ser instalada com quedas de 1 a 200 m de altura e vazões de 0,025 a 13 m3/s. Com a evolução apresentada principalmente nas últimas duas décadas por firmas tradicionais como: Ossberger Turbinenfabrick ou mais novas como a CINK, pode alcançar diâmetros de rotores próximos de 1,0 m com largura de até 3,0m e desenvolver potência de até 2000 kW, com rendimentos que já podem chegar a 90%. As principais evoluções estão concentradas em modificações no injetor da turbina, emprego de novos materiais nas pás, eixo e rolamentos do rotor e em tentativas de utilização do tubo de sucção. Um dos estudos de mostra a viabilidade técnica e econômica na implantação de uma turbina de fluxo cruzado em comparação com as turbinas Francis e Kaplan. As conclusões serão relatadas após a análise de viabilidade técnico-econômica entre os três tipos de turbinas.
It is forecasted that in next 20 years the hydraulic energy will contribute with almost 30% of the total electric power of the planet, while this participation is today near 19%. Many countries have firm initiatives of implementation on SHPs, in medium or long terms. In Brazil, a new incentive program for SHPs is being introduced by ELETROBRAS. However, the forecast for the number of small plants and output installed into Ten-Year Expansion Plan of Energy to the year 2006 is relatively small (15 SHP amount to 93.71 MW, compared to feasible levels of 2,161 SHPs and 3,633 MW. (Source: SIPOTELETROBRAS april / 98). The average electric power consumption per inhabitant in Brazil is below of the world average consumption (1,805 kWh/year against 2,160 kWh/year. Source: SIESE - Annual summary 1999 and International Energy Outlook 1998 DOE/EIA) and when compared with the different regions of the Brazilian territory this discrepancy becomes still larger. Several types of hydraulic turbines can be used in small hydropower, as Pelton, Francis, Turgo, Kaplan, Propeller, Banki, etc. In Brazil the more used are Francis and Kaplan followed by Pelton. The usage of the other types is almost that unknown, mainly the Turgo turbine. The cross flow turbine, also known by the names of: MichellBanki, Banki, and MichellOssberger is defined as an action turbine that can be applicable to falls from 1 to 200 m and flows from 0,025 to 13 m3/s. With the evolution technical presented mainly in the last two decades by traditional firms like Ossberger Turbinenfabrik and new firms like CINK, that turbine can reach diameters of rotors of 1,0 m with width of 2,6m and to develop capacity up to 2,000 kW, with efficiency near 90%. The main evolutions are concentrated in modifications presented in the injector of the turbine by several manufacturers, and the use of new materials in the blades of the runner, shafts, bearings and the use of the draft tube. Case study shows the technical and economical implications using a cross flow turbine in comparison to a Francis turbine and a Kaplan. The conclusions will be reported after technical and economical viability analysis among the three types of turbines.
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Bumba, Manuel Ismael Dongoxe. "Estudo de uma tubeira e de um sistema de controlo de caudal da turbina "Cross-Flow"." Master's thesis, Escola Superior de Tecnologia do Instituto Politécnico de Setúbal, 2012. http://hdl.handle.net/10400.26/3852.

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Mestrado em Energia
No âmbito das energias renováveis, os aproveitamentos hídricos são uma das soluções para a diminuição das emissões de poluentes resultantes da produção de energia eléctrica. Ao contrário das grandes barragens hidroeléctricas que têm bastantes impactos ambientais, verifica-se que as pequenas hídricas são uma solução mais barata e com menor impacto ambiental, e por isto com um futuro promissor. Neste projecto será efectuado o estudo numérico do escoamento de uma tubeira da turbina cross-flow, bem como do funcionamento de um sistema de controlo de caudal. Para a análise numérica do escoamento na tubeira e na válvula reguladora de caudal, irá ser utilizado um programa computacional já desenvolvido de análise do escoamento. Posteriormente serão analisados os resultados numéricos obtidos, nomeadamente, a velocidade e a pressão nas paredes da tubeira, bem como o ângulo e módulo da velocidade no arco de entrada no rotor e os caudais debitados pela mesma. O estudo dos métodos de desenho utilizados nas tubeiras, bem como o funcionamento dos sistemas de controlo de caudal existentes serão também abordados, com o objectivo de adquirir sensibilidade/experiência para efectuar-se posteriormente os desenhos de detalhe de uma tubeira com válvula reguladora de caudal considerada mais adequada. Será também apresentado um método inovador de construção da tubeira. Finalmente, serão analisados os esforços mecânicos (força e momento), resultantes da acção do escoamento de água na tubeira e válvula reguladora de caudal.
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Somoano, Rodríguez Miguel. "Performance and flow dynamics in cross-flow turbines." Doctoral thesis, Universitat Rovira i Virgili, 2018. http://hdl.handle.net/10803/553240.

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Aquesta tesi doctoral presenta l'estudi que l'autor va realitzar per comprendre l'efecte de l'angle pitch de la pala sobre les interaccions pala-estela que tenen lloc dins el rotor i, per tant, sobre el rendiment d'una turbina de flux creuat amb tres pales rectes. En primer lloc, hem estudiat experimentalment el rendiment d'aquest tipus de turbina en un túnel de vent de capa límit. Ho vam fer per a diferents pitches fixos de les pales, i amb diferents nombres de Reynolds basats en el diàmetre de la turbina que cobreixen la regió de transició en què el parell produït per les pales va superar el parell resistiu oposat. La forma i els valors de la corba de rendiment van canviar dràsticament amb només un increment de l'angle pitch fix. Com més gran sigui el nombre de Reynolds, menor és el tip speed ratio òptim i més cap al toe-out es mou l'angle pitch ideal. Posteriorment, vam estudiar experimentalment la dinàmica de flux dins el rotor per diferents pitches de la pala en un tanc d'aigua amb carro, usant Digital Particle Image Velocimetry. Els assajos es van realitzar a un nombre de Reynolds basat en el diàmetre de la turbina constant, i per a un rang de tip speed ratios. L'atenció se centra en l'anàlisi de les interaccions pala-estela dins el rotor. Angles toe-in i excessius toe-out s'han associat a baixos rendiments d'aquest tipus de turbines. La investigació ens ha permès relacionar les interaccions pala-estela amb les diferències de rendiment en aquest tipus de turbines, en funció del tip speed ratio i de l'angle pitch de la pala.
Esta tesis doctoral presenta el estudio que el autor realizó para comprender el efecto del ángulo pitch de la pala sobre las interacciones pala-estela que tienen lugar dentro del rotor y, por lo tanto, sobre el rendimiento de una turbina de de flujo cruzado con tres palas rectas. En primer lugar, hemos estudiado experimentalmente el rendimiento de este tipo de turbina en un túnel de viento de capa límite. Lo hicimos para diferentes pitches fijos de las palas, y con diferentes números de Reynolds basados en el diámetro de la turbina que cubren la región de transición en la que el par producido por las palas superó al par resistivo opuesto. La forma y los valores de la curva de rendimiento cambiaron drásticamente con sólo un incremento del ángulo pitch fijo. Cuanto mayor sea el número de Reynolds, menor es el tip speed ratio óptimo y más hacia el toe-out se mueve el ángulo pitch ideal. Posteriormente, estudiamos experimentalmente la dinámica de flujo dentro del rotor para diferentes pitches de la pala en un tanque de agua con carro, usando Digital Particle Image Velocimetry. Los ensayos se realizaron a un número de Reynolds basado en el diámetro de la turbina constante, y para un rango de tip speed ratios. La atención se centra en el análisis de las interacciones pala-estela dentro del rotor. Ángulos toe-in y excesivos toe-out se han asociado a bajos rendimientos de este tipo de turbinas. La investigación nos ha permitido relacionar las interacciones pala-estela con las diferencias de rendimiento en este tipo de turbinas, en función del tip speed ratio operativo y del ángulo pitch de la pala.
This doctoral thesis presents the study that the author have carried out in order to understand the effect of the blade pitch angle on the blade-wake interactions that take place inside the rotor, and hence on the performance of a three straight bladed cross-flow turbine. Firstly, we have experimentally studied the performance of this kind of turbine in a boundary layer wind tunnel. We did it for different fixed blade pitches, and at different turbine diameter Reynolds numbers covering the transitional region in which the torque produced by the blades overtook the opposed resistive torque. Shape and values of the performance curve changed drastically with just an increment of the fixed pitch angle. The higher the Reynolds number, the lower the optimal tip speed ratio and the more towards toe-out the ideal pitch angle is moved. Afterwards, we study experimentally the flow dynamics inside the rotor for different blade pitches in a water towing tank, using planar Digital Particle Image Velocimetry. Tests were made at a constant turbine diameter Reynolds number, and for a range of tip speed ratios. The focus is given to the analysis of the blade-wake interactions inside the rotor. Toe-in and excessive toe-out angles have been associated to low performances of this type of turbines. The investigation has allowed us to relate the blade-wake interactions with the performance differences in this type of turbines, as a function of both the operational tip speed ratio and the blade pitch angle.
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Consul, Claudio Antonio. "Hydrodynamic analysis of a tidal cross-flow turbine." Thesis, University of Oxford, 2011. http://ora.ox.ac.uk/objects/uuid:0f9c201f-882d-4f44-b4c6-96f7658b1621.

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This study presents a numerical investigation of a generic horizontal axis cross-flow marine turbine. The numerical tool used is the commercial Computational Fluid Dynamics package ANSYS FLUENT 12.0. The numerical model, using the SST k-w turbulence model, is validated against static, dynamic pitching blade and rotating turbine data. The work embodies two main investigations. The first is concerned with the influence of turbine solidity (ratio of net blade chord to circumference) on turbine performance, and the second with the influence of blockage (ratio of device frontal area to channel crosssection area) and free surface deformation on the hydrodynamics of energy extraction in a constrained channel. Turbine solidity was investigated by simulating flows through two-, three- and four-bladed turbines, resulting in solidities of 0.019, 0.029 and 0.038, respectively. The investigation was conducted for two Reynolds numbers, Re = O(10^5) & O(10^6), to reflect laboratory and field scales. Increasing the number of blades from two to four led to an increase in the maximum power coefficient from 0.43 to 0.53 for the lower Re and from 0.49 to 0.56 for the higher Re computations. Furthermore, the power curve was found to shift to a lower range of tip speed ratios when increasing solidity. The effects of flow confinement and free surface deformation were investigated by simulating flows through a three-bladed turbine with solidity 0.125 at Re = O(10^6) for channels that resulted in cross-stream blockages of 12.5% to 50%. Increasing the blockage led to a substantial increase in the power and basin efficiency; when approximating the free surface as a rigid lid, the highest power coefficient and basin efficiency computed were 1.18 and 0.54, respectively. Comparisons between the corresponding rigid lid and free surface simulations, where Froude number, Fr = 0.082, rendered similar results at the lower blockages, but at the highest blockage an increase in power and basin efficiency of up to 7% for the free surface simulations over that achieved with a rigid lid boundary condition. For the free surface simulations with Fr = 0.082, the energy extraction resulted in a drop in water depth of up to 0.7%. An increase in Fr from 0.082 to 0.131 resulted in an increase maximum power of 3%, but a drop in basin efficiency of 21%.
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Stringer, Robert. "Numerical investigation of cross-flow tidal turbine hydrodynamics." Thesis, University of Bath, 2018. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.760981.

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The challenge of tackling global climate change and our increasing reliance on power means that new and diverse renewable energy generation technologies are a necessity for the future. From a number of technologies reviewed at the outset, the cross-flow tidal turbine was chosen as the focus of the research. The numerical investigation begins by choosing to model flow around a circular cylinder as a challenging benchmarking and evaluation case to compare two potential solvers for the ongoing research, ANSYS CFX and OpenFOAM. A number of meshing strategies and solver limitations are extracted, forming a detailed guide on the topic of cylinder lift, drag and Strouhal frequency prediction in its own right. An introduction to cross-flow turbines follows, setting out turbine performance coefficients and a strategy to develop a robust numerical modelling environment with which to capture and evaluate hydrodynamic phenomena. The validation of a numerical model is undertaken by comparison with an experimentally tested lab scale turbine. The resultant numerical model is used to explore turbine performance with varying Reynolds number, concluding with a recommended minimum value for development purposes of Re = 350 × 103 to avoid scalability errors. Based on this limit a large scale numerical simulation of the turbine isconducted and evaluated in detail, in particular, a local flow sampling method is proposed and presented. The method captures flow conditions ahead of the turbine blade at all positions of motion allowing local velocities and angles of attack to be interrogated. The sampled flow conditions are used in the final chapter to construct a novel blade pitching strategy. The result is a highly effective optimisation method which increases peak turbine power coefficient by 20% for only two further case iterations of the numerical solution.
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Pokhrel, Sajjan. "Computational Modeling of A Williams Cross Flow Turbine." Wright State University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=wright1515428122798392.

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Walseth, Eve Cathrin. "Investigation of the Flow through the Runner of a Cross-Flow Turbine." Thesis, Norwegian University of Science and Technology, Department of Energy and Process Engineering, 2009. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-9986.

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The cross-flow turbine is unique due to the generation of power during two stages. The water flows through the rectangular cross-section nozzle and enters the runner, where the first stage power is generated. The water then flows diametrically through the center of the runner, before it hits the blades on the way out, generating the second stage power. This type of turbine is often used in small hydropower plants located in less-developed countries. The turbine has a simple design, which is economical and easy to manufacture. A cross-flow turbine manufactured by Remote HydroLight in Afghanistan was installed in The Waterpower Laboratory at The Norwegian University of Science and Technology in September 2008. During the fall of 2008, efficiency measurements were performed on the turbine. A maximum efficiency of 78.6% was obtained at 5 meter head. However, although the efficiency is high for a turbine with such a simple design, there is a desire to improve it for better utilization of the resources. An open question is if the flow through the runner behaves like the manufacturers of this turbine type claim. It is therefore of interest to investigate the flow pattern through the runner and the distribution of torque transferred during the two stages. This is the objective of this thesis. Two experiments are performed in this thesis. The objective of the first experiment was to visualize the flow through the runner with use of a high-speed camera. This required an extensive remodeling of the turbine in order to obtain a clear view of the flow. However, the high--speed camera had to be replaced by a single-lens reflex camera and stroboscopes, due to low quality pictures. The second experiment measured the torque transfer to the runner by the use of strain gages. The strain gages could not be calibrated within the time frame of this thesis, but a relative measure of the distribution of torque was obtained. During both experiments the efficiency was measured, but the main objective was to determine the flow pattern and torque transfer through the runner. The results show that the turbine works well for large nozzle openings. The water enters the runner close to the nozzle outlet, leading to a cross flow entering the inside of the runner at a short distance from the nozzle. This gives good conditions for the flow, as the direction of the absolute velocity when entering the second stage corresponds well with the blade inlet angle. At best efficiency point the second stage contributes to 53.7% of the total amount of torque transferred. With decreasing nozzle opening, the cross flow enters the inside of the runner further away from the nozzle. This give a direction of the cross flow which corresponds poorly with the inlet angle of the blades at the second stage, which increases the incidence losses and gives a lower efficiency.

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Carrotte, Jonathan F. "The mixing characteristics of dilution jets issuing into a confined cross-flow." Thesis, Loughborough University, 1990. https://dspace.lboro.ac.uk/2134/32627.

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An experimental investigation has been carried out into the mixing of a row of jets injected into a confined cross-flow. Measurements were made on a fully annular test facility, the geometry of the rig simulating that found in the dilution zone of a gas turbine combustion chamber. A small temperature difference of 44°C between the cross-flow and dilution fluid allowed the mixing characteristics to be assessed, with hot jets being injected into a relatively cold cross-flow at a jet to cross-flow momentum flux ratio of 4.0. The investigation concentrated on differences in the mixing of individual dilution jets, as indicated by the regularity of the temperature patterns around the cross-flow annulus. Despite the uniform conditions approaching the dilution holes there were significant differences in the temperature patterns produced by the dilution jets around the annulus.
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Lind, Eric K. "Analysis of turbulence models in a cross flow pin fin micro-heat exchanger." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2002. http://library.nps.navy.mil/uhtbin/hyperion-image/02Jun%5FLind.pdf.

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Lin, Chao-An. "Three-dimensional computations of injection into swirling cross-flow using second-moment closure." Thesis, University of Manchester, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.280543.

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Books on the topic "Turbina cross-flow"

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

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John, D. St. Effect of jet injection angle and number of jets on mixing and emissions from a reacting crossflow at atmospheric pressure. [Washington, D.C.]: National Aeronautics and Space Administration STI Preogram Office, 2000.

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B, Lakshminarayana, and United States. National Aeronautics and Space Administration. Scientific and Technical Information Program., eds. Three dimensional viscous flow field in an axial flow turbine nozzle passage. [Washington, D.C.]: National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Program, 1997.

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Inc, OTT Engineering, ed. Inexpensive cross-flow hydropower turbine at the Arbuckle Mountain hydroelectric project (Reports). U.S. Dept. of Energy, Idaho Field Office., 1991.

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Experimental study of cross flow mixing in cylindrical and rectangular ducts. [Washington, DC: National Aeronautics and Space Administration, 1993.

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

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A, Cyr M., Strange R. R, and United States. National Aeronautics and Space Administration., eds. Turbine blade and vane heat flux sensor development phase 2. [Washington, DC]: National Aeronautics and Space Administration, 1985.

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D, Holdeman J., Samuelsen G. S, and Lewis Research Center, eds. Optimization of jet mixing into a rich, reacting crossflow. [Cleveland, Ohio]: National Aeronautics and Space Administration, Lewis Research Center, 1998.

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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. [Washington, DC]: National Aeronautics and Space Administration, 1995.

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S, Samuelsen G., and United States. National Aeronautics and Space Administration., eds. Quick-mixing studies under reacting conditions: Under grant NAG3-1110. [Washington, DC: National Aeronautics and Space Administration, 1996.

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Book chapters on the topic "Turbina cross-flow"

1

Zhang, Zh. "Viscous Cross-Flow Through the Bucket." In Pelton Turbines, 171–78. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-31909-4_11.

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Ferrer, Esteban, and Soledad Le Clainche. "Flow Scales in Cross-Flow Turbines." In Springer Tracts in Mechanical Engineering, 1–11. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-16202-7_1.

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Ferrer, Esteban, and Soledad Le Clainche. "Simple Models for Cross Flow Turbines." In Recent Advances in CFD for Wind and Tidal Offshore Turbines, 1–10. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-11887-7_1.

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Saini, Gaurav, and R. P. Saini. "Performance Study of Cross Flow Hybrid Hydrokinetic Turbine." In Water Science and Technology Library, 249–57. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-59148-9_17.

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Pellone, Christian, Thierry Maitre, and Ervin Amet. "3D RANS Modeling of a Cross Flow Water Turbine." In Advances in Hydroinformatics, 405–18. Singapore: Springer Singapore, 2013. http://dx.doi.org/10.1007/978-981-4451-42-0_33.

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Yadav, Virendra Kumar, and S. K. Singal. "Performance Analysis of Cross-Flow Turbine: Variation in Shaft Diameter." In Water Science and Technology Library, 487–97. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-55125-8_42.

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Sivamani, Seralathan, R. Hemanth Prasanna, J. Arun, Mikhail Christopher, T. Micha Premkumar, P. Bharath Kumar, Yeswanth Yadav, and V. Hariram. "Assessing Small Cross Flow Wind Turbine for Urban Rooftop Power Generation." In Lecture Notes in Electrical Engineering, 105–14. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-7245-6_9.

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Choi, Y. D., J. I. Lim, C. G. Kim, Y. T. Kim, and Y. H. Lee. "CFD Analysis for the Performance of Cross-Flow Hydraulic Turbine with the Variation of Blade Angle." In New Trends in Fluid Mechanics Research, 428–31. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-75995-9_140.

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McElroy, Michael B. "Power from Wind : Opportunities And Challenges." In Energy and Climate. Oxford University Press, 2016. http://dx.doi.org/10.1093/oso/9780190490331.003.0014.

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The key step in generating electricity from wind involves capturing and harvesting the kinetic energy of the wind (the energy presented by the directed motion of the air). The blades of a wind turbine are shaped such that the interaction with wind results in a difference in pressure between the top and bottom of the blades. It is this difference in pressure that causes the blades to rotate. And ultimately it is the rotation of the blades that results in the production of electricity. The physical principle behind the operation of a wind turbine is the same as that that allows a heavy aircraft to stay aloft. The wings of a plane are shaped so that the distance the air has to travel to traverse the underside of the wings is less than the distance it has to move to cross the top. As a result, the flow of air across the top is faster than the flow across the bottom. Bernoulli’s Principle states that the greater the speed of the flow, the lower the pressure and vice versa. The difference in pressure between the top and bottom of the wings is what allows the plane to stay aloft (the pressure below is higher, reflecting the lower wind speed). The net upward force exerted by the pressure difference across the wings compensates for the downward pull of gravity, providing the lift that offsets the weight of the plane. There is a fundamental limit to the extent to which the kinetic energy delivered by the wind can be deployed to turn the blades of the turbine. The absolute limit to the efficiency, derived first by the German physicist Albert Betz and named in his honor (the Betz limit) is 59.3%. With careful design, modern turbines have been able to achieve efficiencies ranging as high as 80% of the Betz limit. They are capable in this case of capturing and making use of as much as 48% of the kinetic energy intercepted by the blades of the turbine and to deploy this power to perform useful functions, most notably to generate electricity.
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Olgun, H., and A. Ulku. "A STUDY OF CROSS-FLOW TURBINE - EFFECTS OF TURBINE DESIGN PARAMETERS ON ITS PERFORMANCE." In Renewable Energy, Technology and the Environment, 2834–38. Elsevier, 1992. http://dx.doi.org/10.1016/b978-0-08-041268-9.50080-8.

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Conference papers on the topic "Turbina cross-flow"

1

Sekar, Jayanth, Arvind Rao, Sreedhar Pillutla, Allen Danis, and Shih-Yang Hsieh. "Liquid Jet in Cross Flow Modeling." In ASME Turbo Expo 2014: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/gt2014-26124.

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All key combustor performance & operability characteristics like emissions, exit profile, durability, LBO etc. have a dependence on spray quality. Hence it is important to accurately predict spray characteristics for accurate combustor modeling. In this paper, a CFD based liquid jet in cross flow spray modeling approach adopted at GE Aviation is presented. Liquid jet in cross flow is a complex phenomenon that broadly involves jet trajectory evolution, surface breakup, column fracture and dispersion of secondary droplet particles. A two-phase steady state Volume of Fluid (VOF) approach is used to predict the liquid jet trajectory. A combination of output from VOF and empirical correlations (Sallam et. al; Oda et. al) is used to predict droplet distribution that includes diameter, velocity components and mass flow rate. Surface breakup is modeled by injecting droplets along the leeward surface of the liquid jet with spanwise perturbation to capture the transverse spread. Jet column breakup is modeled by injecting droplets including effects of unsteady fluctuations empirically to mimic the column fracture behavior. Discrete particles are then transported in a lagrangian frame coupled with secondary breakup of droplets. This approach has been validated on a benchmark quality dataset with an average SMD (Sauter Mean Diameter) error of ∼6 microns and is being used on Gas Turbine combustor fuel-air mixing devices employing liquid jet in cross flow atomizers.
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Koirala, Supriya, Bhola Thapa, and Torbjorn Kristian Nielsen. "Analysis of the flow condition in a cross flow turbine." In 2014 3rd International Conference on the Developments in Renewable Energy Technology (ICDRET). IEEE, 2014. http://dx.doi.org/10.1109/icdret.2014.6861699.

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Patel, Kashyap, Chaina Ram, and Vishal Rasaniya. "Numerical Analysis of Turbulent Mixing in Cross Flow Configurations." In ASME 2019 Gas Turbine India Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/gtindia2019-2506.

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Abstract The gas turbine combustion chamber is a vital part of a gas turbine engine. Proper mixing of air in the combustor plays an important role in combustion. Increasing mixing rate is an important factor for better combustion efficiency. The injection of air in crossflow is widely studied over the years. The air injected at an angle in upstream direction gives better mixing by colliding with the crossflow. The computational analysis of the injected jet in cross flow is performed with different angles in the upstream direction. The k-omega SST turbulence model was used to investigate the mixing behavior. The air is injected at different angles and observed that with an increase in angle from 60° to 135°, the rate of mixing and turbulent intensity increased. The jet inclination in the upstream direction greatly influenced the mixing behavior. The jet penetration in perpendicular direction was almost the same for 120° and 135°. But there is added penalty in the form of the pressure loss at the angle 135°. So considering the pressure loss and ease of manufacturing the 120° jet inclination is preferable for better mixing among the four cases studied here. The idea of inclining jet in upstream direction can be implemented on the combustor for increased performance and shorter size.
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Ejiri, E., S. Yabe, S. Hase, and M. Ogiwara. "Unsteady Flow Analysis of the Vertical Axis Cross-Flow Wind Turbine." In ASME 2006 2nd Joint U.S.-European Fluids Engineering Summer Meeting Collocated With the 14th International Conference on Nuclear Engineering. ASMEDC, 2006. http://dx.doi.org/10.1115/fedsm2006-98208.

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Flow through the vertical axis cross-flow wind turbine was analyzed using computational fluid dynamics (CFD) to clarify current aerodynamic issues and to propose an improved design configuration for achieving better performance. The computed torque coefficients and power coefficients of a reference cross-flow wind turbine runner were compared with the experimental results. Flow around each blade of the turbine runner was then investigated based on the computed flow results. As a countermeasure to the issues found, a new wind turbine design was devised which has two guide vanes point-symmetrically arranged outside the turbine runner. It was experimentally shown that this improved design with the guide vanes increased turbine efficiency. However, performance predictions by CFD lack sufficient accuracy in the case of the turbine runner with the guide vanes, where complexity and unsteadiness prevail over the entire flow fields.
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Takeuchi, Kazuki, Junichiro Fukutomi, Hidetoshi Kodani, and Hironori Horiguchi. "Study on Performance and Internal Flow of Cross-Flow Wind Turbine." In ASME/JSME 2003 4th Joint Fluids Summer Engineering Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/fedsm2003-45101.

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The wind turbine has become more popular in recent years, but on the other hand, the developments of small wind-turbine have been legging behind. Because, the energy density of wind is small, since the efficiency of the main part of a wind turbine is very low. The construction costs become comparatively high-priced. Then, the main part of this subject is to show that, by collecting and sucking out more winds, a wind turbine is made to pass many winds and the new cross-flow wind turbine that increases an output coefficient is proposed. The cross-flow wind turbine has high torque and low speed characteristics and the structure are very simple. So, it can be used in a large wind velocity region. However, even if the power coefficient is high, it is about 10%. The purpose of this paper is to show how we can improve the power coefficient by applying a casing, which has a nozzle and a diffuser. This research was made to clear up fundamental characteristics of the interaction between outer flow and inner flow. Three kinds of cross-flow wind turbines were designed. The nozzle and diffuser have been designed suitable for the performance of wind turbine. The flow simulations by CFD have been carried out for various types of casings at 20 m/s with Fluent Ver5.0. All Wind tunnel experiments were performed at 20m/s. The case of casing 2, which have plate arranged near the separation point of cylinder, also experimented. The rotor that is settled in the casing 1 shows a larger power coefficient than the case without a casing. The casing of the cross-flow turbine makes a pressure difference between inflow and outflow. The pressure difference increases the mass flow rate. Therefore much more wind passes through into the cross-flow turbine. In this experiment, the power coefficient increased 1.5 times in the case with casing. A still higher output coefficient could be obtained in the case where it is shown by the casing 2.
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Mathioulakis, D., and D. E. Papantonis. "LDA flow-field measurements on a BANKI (cross-flow) water turbine." In Laser Anemometry: Advances and Applications--Fifth International Conference, edited by J. M. Bessem, R. Booij, H. W. H. E. Godefroy, P. J. de Groot, K. K. Prasad, F. F. M. de Mul, and E. J. Nijhof. SPIE, 1993. http://dx.doi.org/10.1117/12.150574.

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Lückmann, Dominik, Max Stadermann, Richard Aymanns, and S. Pischinger. "Investigation of Cross Flow in Double Entry Turbocharger Turbines." In ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/gt2016-57190.

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The downsizing of combustion engines has become the major strategy within the automotive industry to meet the increasing demands in terms of fuel economy and harmful emissions. Furthermore, it is important to fulfil the customers expectations in terms of drivability by increasing the power density and transient performance of the engines. The key technology to reach these ambitious targets is the enhanced utilization of exhaust pulses on turbocharged engines. In four cylinder gasoline engine applications this is mainly realized by the use of double entry turbines or variabilities in the exhaust valve train. During the designing and matching process of double entry turbines it is still a major challenge to predict the turbine power output and accurately model its interaction with the engine. In the past few years, several authors have published measurement and simulation technologies aimed at enhanced modelling quality. Most of these approaches are based on the introduction of different flow conditions which help to describe the thermodynamic performance under various pulsating boundary conditions. Within an average engine cycle, the turbine operates under equal, single and unequal admissions. Furthermore, the evaluation of a turbine interacting with a four cylinder gasoline engine shows that cross flow between both turbine scrolls can occur during the blow-down phase of the cylinders. In this phase, the temperature and pressure upstream of the turbine reach their peak values within the complete engine cycle. Therefore, this phase is most crucial for the conversion of the exhaust energy into mechanical energy, which drives the compressor impeller of the turbocharger. This work focuses on the results of stationary hot gas measurements and 3D CFD simulations of the cross flow phenomena to gain a deeper understanding of the scroll interaction in double entry turbines and its impact on engine performance. The findings were used to improve the modeling quality of double entry turbines in 1D engine process simulations, especially during the exhaust blow down where cross flow between the dividing wall and the turbine wheel occurs. The new methodology to quantify the amount of cross flow with a hot gas test has shown that the cross flow rate of a twin scroll turbine can reach values as high as 35% of the overall flow rate entering the turbine housing, whereas this value can be significantly reduced by using a segment turbine housing. The new map based turbine model, which enables predictive simulations, covers all engine relevant flow conditions of the turbine including cross flow. This is important because the cross flow has a large impact on the exhaust pulse separation and thus on the residual gas fraction of the cylinders after the gas exchange.
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Mazur, Joseph, and Trilochan Singh. "Momentum Exchanges and Energy Transfers in Cross Flow Fans." In ASME 1987 International Gas Turbine Conference and Exhibition. American Society of Mechanical Engineers, 1987. http://dx.doi.org/10.1115/87-gt-32.

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An experimental investigation of the flow in a cross flow fan at three operating conditions is reported. Velocity and pressure maps for the flow field are presented along with a determination of the momentum exchanges and energy transfers between the blading and the flow field regions.
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Zhang, Huisheng, Wenshu Zhang, Zhenhua Lu, and Shilie Weng. "Performance Comparison on Cross-Flow and Counter-Flow Planar Solid Oxide Fuel Cell." In ASME Turbo Expo 2012: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/gt2012-68540.

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Solid oxide fuel cell (SOFC) is a complicated system with heat and mass transfer as well as electrochemical reactions. The flow configuration has great impact on the system performance. Based on the established one dimensional direct internal reforming SOFC mathematical model, with the consideration of the flow, thermal and electrical characteristic, this paper developed the two dimensional mathematical model for both counter-flow and cross-flow types. Plus, the comparison and analysis of the steady distribution are performed. The results reveal that on the geometry parameters and inlet conditions, the outlet temperatures of counter-flow SOFC are lower than that of cross-flow. However, the average temperature of PEN plate is higher than cross-flow, and both the operating voltage and electric efficiency are also higher than that of cross-flow. This will be beneficial for the structure design of SOFC.
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Sharma, Preetam, and Vaibhav Arghode. "Experimental Investigation of Low Emission Liquid Fuelled Reverse Cross Flow Combustor." In ASME 2017 Gas Turbine India Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/gtindia2017-4601.

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This study deals with an experimental investigation of a low emission liquid fuelled (ethanol) reverse cross-flow combustor. This investigation is carried out to cater to the need of burning liquid fuels (including alternative fuels) with minimum emissions in gas turbine engines used for both aircraft and land based power generation applications using modern combustion technologies. In the present combustor design, the air inlet and the exhaust ports are located on the same side (and hence the name reverse-flow) whereas the liquid fuel is injected directly into the strong cross-flow of the air using a small diameter round tube to aid fuel atomization. Hence, a conventional atomization system is absent in the investigated combustor. The reverse-flow configuration allows effective internal product gas recirculation to facilitate the preheating and dilution of the oxidizer stream and stabilization of a distributed reaction zone. This apparently suppresses near stoichiometric reactions and hot spot regions resulting in low pollutant (NOx and CO) emissions. In the present case, the heat load is varied (keeping a constant air flow rate) from 3.125 kW to 6.25 kW which results in the thermal intensity variation from 19 MW/m3-atm to 39 MW/m3-atm. Two different tubes with internal diameters (dfuel) of 0.5 mm and 0.8 mm are used for injection of liquid fuel into the cross flow of air. The combustor was also tested in premixed-prevaporized (PP) mode with ethanol for benchmarking. The combustion process was found to be stable with NOx emissions of 1.6 ppm (premixed-prevaporized), 8 ppm (dfuel = 0.5 mm), 9 ppm (dfuel = 0.8 mm). The CO emissions were 5 ppm (premixed-prevaporized), ∼100 ppm (dfuel = 0.5, 0.8 mm), at atmospheric pressure operation (corrected to 15% O2) and ϕ = 0.7, Tadiabatic ∼1830 K. Reaction zone positioning inside the combustor was investigated using OH* chemiluminescence imaging and global flame pictures, and the same was found to be located in the vicinity of the air jet.
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Reports on the topic "Turbina cross-flow"

1

Inexpensive cross-flow hydropower turbine at Arbuckle Mountain Hydroelectric Project. Office of Scientific and Technical Information (OSTI), July 1991. http://dx.doi.org/10.2172/5086690.

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Inexpensive cross-flow hydropower turbine at the Arbuckle Mountain Hydroelectric Project. Office of Scientific and Technical Information (OSTI), November 1989. http://dx.doi.org/10.2172/6891779.

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