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Journal articles on the topic 'Turbina cross-flow'

Author: Grafiati

Published: 4 June 2021

Last updated: 11 February 2022

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1

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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2

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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3

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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4

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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5

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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6

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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7

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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8

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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9

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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10

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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11

Desai, V. R., and N. M. Aziz. "Parametric Evaluation of Cross‐Flow Turbine Performance." Journal of Energy Engineering 120, no. 1 (April 1994): 17–34. http://dx.doi.org/10.1061/(asce)0733-9402(1994)120:1(17).

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12

Totapally, Hara G. S., and Nadim M. Aziz. "Refinement of Cross‐Flow Turbine Design Parameters." Journal of Energy Engineering 120, no. 3 (December 1994): 133–47. http://dx.doi.org/10.1061/(asce)0733-9402(1994)120:3(133).

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13

Santoso, Budi, and Dominicus Danardono Dwi Prija Tjahjana. "The Influence of Guide Vane to the Performance of Cross-Flow Wind Turbine on Waste Energy Harvesting System." MATEC Web of Conferences 159 (2018): 02014. http://dx.doi.org/10.1051/matecconf/201815902014.

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The purpose of this experiment is to know the influence of a single guide vane position and angle to the performance of a cross-flow wind turbine. The cross-flow wind turbine was positioned at the discharge outlet of a cooling tower model to harness the discharged wind for electricity generation. A guide vane was used to enhance the rotational speed of the turbines for power augmentation. Various position and angle of attack of the guide vane were tested in this experiment. To avoid negative impact on the performance of the cooling tower fan and to optimize the wind turbine performance, the turbine position on the discharge wind stream was also studied. The result showed that cross-flow wind turbine with a guide vane attached at the right position had a higher coefficient of power than cross flow turbine without guide vane. A crossflow wind turbine with the guide vane at the position of 150 mm from the center and 30° angles had the highest coefficient of power of 0.49. Comparing to the wind turbine without guide vane, the coefficient of power of the cross-flow wind turbine was increased about 84.3%.

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14

Goundar, Jai Nendran, Niranjwan Chettiar, Sumesh Narayan, Ashneel Deo, and Deepak Prasad. "Design of a Ducted Cross Flow Turbine for Fiji." Applied Mechanics and Materials 772 (July 2015): 561–65. http://dx.doi.org/10.4028/www.scientific.net/amm.772.561.

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Marine current energy is clean and reliable energy source. It can be alternative energy source to produce electricity if tapped with a suitable marine current energy converter. Pacific Island countries (PIC) like Fiji can reduce the amount of Fossil fuel used. However for most energy converters designed perform well at marine current velocities above 2m/s and it needs to be installed at depths of 20 – 40m also installation and the maintenance cost of such devise will be quite high if it needs to be installed in Fiji. Therefore a ducted cross flow turbine was designed, which can give desired output at minimum installation and maintenance cost. A dusted cross flow turbine has been design taking into account for its operating condition. The turbine was modelled and analyzed in commercial; Computational Fluid dynamic (CFD) code ANSYS-CFX. The code was first validated and with experiment results and finally performance analysis of full scale turbine was carried out. The designed turbine can have maximum efficiency of 56% producing rated power of 21kW; it produces 0.77kW at cut in speed of 0.65m/s.

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15

Pomfret, M. J., K. Chiu, and K. Lam. "Tangential Flow Effects in Cross Flow Hydraulic Turbines." HKIE Transactions 2, no. 1 (January 1995): 39–42. http://dx.doi.org/10.1080/1023697x.1995.10667679.

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16

Tahir, Muhammad Hamza, Shoukat Ali Mugheri, Salman Ahmad, Mughees Shahid, Nouman Zaffar, Muhammad Arsalan Malik, and Muhammad Asad Saeed. "Production of electricity employing sewerage lines using a micro cross flow turbine." International Journal of Engineering, Science and Technology 12, no. 2 (June 1, 2020): 67–77. http://dx.doi.org/10.4314/ijest.v12i2.8.

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In the design of cross flow turbines, efficiency is a significant parameter. The crossflow turbine for developing nations is the most cost-efficient electricity generation source and often used in isolated power systems. This research work analyzes the potential of electricity production using a micro-cross flow turbine from sewage lines. To measure the hydraulic potential of the sewage’s wastewater, flow rate at the connection point was investigated by experimentation on site and the efficiency of the micro cross flow turbine was evaluated. The experimental results show that the hydraulic potential of the selected point for electricity production is enough throughout the year. It also shows that the micro-cross flow turbine can be used effectively to produce electricity from the sewage at the link points. The highest efficient 2 mm head was observed with a maximum flow rate of 0.112 m3/s. Depending on the flow rate, the turbine velocity was 103-263 rpm. The maximum power of shaft was 284.58 W and the highest power generated was 196.24 W. The maximum overall efficiency was 68.2%. This article discusses the design, efficiency, operation and cost of low-head micro crossflow turbines. Keywords: Electricity Generation, Hydraulic Potential, Micro Cross Flow Turbine, Sewage

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17

Nishi, Yasuyuki, Terumi Inagaki, Yanrong Li, and Kentaro Hatano. "Study on an Undershot Cross-Flow Water Turbine with Straight Blades." International Journal of Rotating Machinery 2015 (2015): 1–10. http://dx.doi.org/10.1155/2015/817926.

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Small-scale hydroelectric power generation has recently attracted considerable attention. The authors previously proposed an undershot cross-flow water turbine with a very low head suitable for application to open channels. The water turbine was of a cross-flow type and could be used in open channels with the undershot method, remarkably simplifying its design by eliminating guide vanes and the casing. The water turbine was fitted with curved blades (such as the runners of a typical cross-flow water turbine) installed in tube channels. However, there was ambiguity as to how the blades’ shape influenced the turbine’s performance and flow field. To resolve this issue, the present study applies straight blades to an undershot cross-flow water turbine and examines the performance and flow field via experiments and numerical analyses. Results reveal that the output power and the turbine efficiency of the Straight Blades runner were greater than those of the Curved Blades runner regardless of the rotational speed. Compared with the Curved Blades runner, the output power and the turbine efficiency of the Straight Blades runner were improved by about 31.7% and about 67.1%, respectively.

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18

SUZUKI, Daichi, Sho KATSUMOTO, Shoichi CHINO, and Eiji EJIRI. "119103 PIV Measurements of Flow in Cross-Flow Wind Turbine." Proceedings of Conference of Kanto Branch 2011.17 (2011): 79–80. http://dx.doi.org/10.1299/jsmekanto.2011.17.79.

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19

Costa Pereira, N. H., and J. E. Borges. "Study of the nozzle flow in a cross-flow turbine." International Journal of Mechanical Sciences 38, no. 3 (March 1996): 283–302. http://dx.doi.org/10.1016/0020-7403(95)00055-0.

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20

Desai, Venkappayya R., and Nadim M. Aziz. "An Experimental Investigation of Cross-Flow Turbine Efficiency." Journal of Fluids Engineering 116, no. 3 (September 1, 1994): 545–50. http://dx.doi.org/10.1115/1.2910311.

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An experimental investigation was conducted to study the effect of some geometric parameters on the efficiency of the cross-flow turbine. Turbine models were constructed with three different numbers of blades, three different angles of water entry to the runner, and three different inner-to-outer diameter ratios. Nozzles were also constructed for the experiments to match the three different angles of water entry to the runner. A total of 27 runners were tested with the three nozzles. The results of the experiments clearly indicated that efficiency increased with increase in the number of blades. Moreover, it was determined that an increase in the angle of attack beyond 24 deg does not improve the maximum turbine efficiency. In addition, as a result of these experiments, it was determined that for a 24 deg angle of attack 0.68 was the most efficient inner-to-outer diameter ratio, whereas for higher angles of attack the maximum efficiency decreases with an increase in the diameter ratio from 0.60 to 0.75.

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21

Achard, Jean-Luc, Favio Dominguez, and Christophe Corre. "Cross flow water turbines: HARVEST technology." Renewable Energy and Environmental Sustainability 1 (2016): 38. http://dx.doi.org/10.1051/rees/2016029.

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22

Doan, Minh N., Yuriko Kai, Takuya Kawata, and Shinnosuke Obi. "Flow Field Measurement of Laboratory-Scaled Cross-Flow Hydrokinetic Turbines: Part I—The Near-Wake of a Single Turbine." Journal of Marine Science and Engineering 9, no. 5 (May 1, 2021): 489. http://dx.doi.org/10.3390/jmse9050489.

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Recent developments in marine hydrokinetic (MHK) technology have put the cross-flow (often vertical-axis) turbines at the forefront. MHK devices offer alternative solutions for clean marine energy generation as a replacement for traditional hydraulic turbines such as the Francis, Kaplan, and Pelton. Following previous power measurements of laboratory-scaled cross-flow hydrokinetic turbines in different configurations, this article presents studies of the water flow field immediately behind the turbines. Two independent turbines, which operated at an average diameter-based Reynolds number of approximately 0.2×105, were driven by a stepper motor at various speeds in a closed circuit water tunnel with a constant freestream velocity of 0.316 m/s. The wakes produced by the three NACA0012 blades of each turbine were recorded with a monoscopic particle image velocimetry technique and analyzed. The flow structures with velocity, vorticity, and kinetic energy fields were correlated with the turbine power production and are discussed herein. Each flow field was decomposed into the time averaged, periodic, and random components for all the cases. The results indicate the key to refining the existed turbine design for enhancement of its power production and serve as a baseline for future comparison with twin turbines in counter-rotating configurations.

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23

FUKUTOMI, Junichiro, Takayuki SUZUKI, and Yoshiyuki NAKASE. "Characteristics of a cross flow turbine-generator system." Transactions of the Japan Society of Mechanical Engineers Series B 55, no. 517 (1989): 2781–86. http://dx.doi.org/10.1299/kikaib.55.2781.

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24

TAKEUCHI, Kazuki, Junichiro FUKUTOMI, Hidetoshi KODANI, and Hironori HORIGUCHI. "Development on High-Performance Cross-Flow Wind Turbine." Proceedings of the JSME annual meeting 2003.2 (2003): 67–68. http://dx.doi.org/10.1299/jsmemecjo.2003.2.0_67.

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25

Sinagra, M., V. Sammartano, C. Aricò, A. Collura, and T. Tucciarelli. "Cross-flow Turbine Design for Variable Operating Conditions." Procedia Engineering 70 (2014): 1539–48. http://dx.doi.org/10.1016/j.proeng.2014.02.170.

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26

Joshi, C. B., V. Seshadri, and S. N. Singh. "Parametric Study on Performance of Cross-Flow Turbine." Journal of Energy Engineering 121, no. 1 (April 1995): 28–45. http://dx.doi.org/10.1061/(asce)0733-9402(1995)121:1(28).

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27

Zaffar, Assad, Bilal Ibrahim, M. Awais Sarwar, Javed Ahmed Chattha, and Muhammad Asif. "Optimisation of blade profiles of cross flow turbine." International Journal of Power and Energy Conversion 9, no. 4 (2018): 311. http://dx.doi.org/10.1504/ijpec.2018.094952.

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28

Chattha, Javed Ahmed, Assad Zaffar, Bilal Ibrahim, Muhammad Asif, and M. Awais Sarwar. "Optimisation of blade profiles of cross flow turbine." International Journal of Power and Energy Conversion 9, no. 4 (2018): 311. http://dx.doi.org/10.1504/ijpec.2018.10011716.

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29

Nishi, Yasuyuki, Terumi Inagaki, Yanrong Li, Ryota Omiya, and Junichiro Fukutomi. "Study on an undershot cross-flow water turbine." Journal of Thermal Science 23, no. 3 (May 13, 2014): 239–45. http://dx.doi.org/10.1007/s11630-014-0701-y.

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30

Fukutomi, Junichiro, Yoshiyuki Nakase, Masashi Ichimiya, and Akihiro Orino. "Running Characteristics of a Cross-Flow Water Turbine in Oscillating Flow." Transactions of the Japan Society of Mechanical Engineers Series B 61, no. 582 (1995): 572–78. http://dx.doi.org/10.1299/kikaib.61.572.

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31

Wahjudi, Arif, I. Made Londen Batan, Bagus Mertha Pradnyana, and Windy Rusweki. "Image Processing Implementation in Measurement of Cross-Flow Water Turbine Geometry." Applied Mechanics and Materials 493 (January 2014): 570–75. http://dx.doi.org/10.4028/www.scientific.net/amm.493.570.

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Recently, many studies have been done to look for renewable energy sources such as kinetic energy from marine or fluvial currents. In its utilization, water turbine plays an important role for taking energy from water current. One of the water turbine types is Cross Flow Water Turbine (CFWT). The performance of the CFWT depends on its geometry. Unfortunately, its geometry is very difficult to be measured using conventional measurement because it has complex geometry. Hence, a non-conventional measurement system based on image processing is proposed in this study to deal with the measurement difficulty of the CFWT geometry.

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32

Laksmana, Satria Candra, A'rasy Fahruddin, and Ali Akbar. "Pengaruh Sudut Pengarah Aliran Pada Turbin Air Crossflow Tingkat Dua Terhadap Putaran dan Daya." R.E.M. (Rekayasa Energi Manufaktur) Jurnal 3, no. 1 (October 11, 2018): 35. http://dx.doi.org/10.21070/r.e.m.v3i1.1591.

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The potential of hydro energy is very large both for large scale and for small scale. Until now, the need for energy continues to increase, so that energy is a very important element in the development of a country or a region. Cross-flow turbines are one type of turbine that is often used for PLTMH. In this study planning a cross-flow water turbine applied to the height and amount of water per second in the irrigation channel water flow, this water flow will rotate the turbine shaft to produce mechanical energy. With variations in the direction of the turbine flow direction, namely 30o, 35o, and 40o, and the same variation of water discharge 10,5 L / s, 21 L / s and 31,5 L / s to determine the effect on the rotation and the power produced. In this study with 12 turbine blades, 30o blade angle, 40o flow direction angle, and 31.5 L / s water discharge obtained the highest first stage turbine rotation value is 478 rpm. Whereas at the flow direction angle of 30o with the same water discharge which is 31.5 L / s so that the first stage of the turbine is obtained is 296 rpm.

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33

Consul, Claudio A., Richard H. J. Willden, and Simon C. McIntosh. "Blockage effects on the hydrodynamic performance of a marine cross-flow turbine." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 371, no. 1985 (February 28, 2013): 20120299. http://dx.doi.org/10.1098/rsta.2012.0299.

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This paper explores the influence of blockage and free-surface deformation on the hydrodynamic performance of a generic marine cross-flow turbine. Flows through a three-bladed turbine with solidity 0.125 are simulated at field-test blade Reynolds numbers, O (10 5 –10 6 ), for three different cross-stream blockages: 12.5, 25 and 50 per cent. Two representations of the free-surface boundary are considered: rigid lid and deformable free surface. Increasing the blockage is observed to lead to substantial increases in the power coefficient; the highest power coefficient computed is 1.23. Only small differences are observed between the two free-surface representations, with the deforming free-surface turbine out-performing the rigid lid turbine by 6.7 per cent in power at the highest blockage considered. This difference is attributed to the increase in effective blockage owing to the deformation of the free surface. Hydrodynamic efficiency, the ratio of useful power generated to overall power removed from the flow, is found to increase with blockage, which is consistent with the presence of a higher flow velocity through the core of the turbine at higher blockage ratios. Froude number is found to have little effect on thrust and power coefficients, but significant influence on surface elevation drop across the turbine.

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34

M, Muas, Baso Nasrullah, Herdiman Herdiman, and Ahsan Muslimin. "Rancang Bangun Fixture Perakitan Runner dan Casing Turbin Cross Flow." Jurnal Sinergi Jurusan Teknik Mesin 17, no. 1 (December 4, 2019): 70. http://dx.doi.org/10.31963/sinergi.v17i1.1595.

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One of the important turbine components to consider in its manufacture is the runner and turbine casing components. The large number of parts that must be welded and the use of tools that do not meet functional requirements causes some problems during the assembly process, the problem is due to the difficulty of obtaining straightness between the disc and runner shaft where both components occur run-out deviations that exceed the allowable tolerance, as well as casing component assembly where almost all of the joints undergo a simple welding process and use of aids causing a very large dimension deviation from the specified tolerance. The use of very simple tools will cause difficulties in controlling the dimensions or uniformity of the shape during the production process. For this reason, a fixture that is suitable for the runner and turbine casing is needed to get the assembly process that matches the specified geometry tolerance. This research makes the fixture design to be used in runner assembly and turbine casing assembly with the assembly method is carried out in stages. The design is done in five stages, namely the stage of problem statement, the stage of making needs analysis, the stage of gathering information and ideas, the stage of making temporary designs and the stage of making the final draft. Fixture manufacturing is done in two stages, namely ordering materials (purchasing materials) and making fixture components. The final result of making runners and casings using a fixture is able to reduce the aberration in the runner and turbine casing components by producing run-outs at runners of 2.0 mm and the straightness of the casing straightness of 1.6 mm, but have not been able to achieve deviations from the targeted one mm.

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35

Forbush, Dominic, Robert J. Cavagnaro, and Brian Polagye. "Power-tracking control for cross-flow turbines." Journal of Renewable and Sustainable Energy 11, no. 1 (January 2019): 014501. http://dx.doi.org/10.1063/1.5075634.

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36

Ferrer, Esteban, and Richard H. J. Willden. "Blade–wake interactions in cross-flow turbines." International Journal of Marine Energy 11 (September 2015): 71–83. http://dx.doi.org/10.1016/j.ijome.2015.06.001.

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37

De Andrade, Jesús, Christian Curiel, Frank Kenyery, Orlando Aguillón, Auristela Vásquez, and Miguel Asuaje. "Numerical Investigation of the Internal Flow in a Banki Turbine." International Journal of Rotating Machinery 2011 (2011): 1–12. http://dx.doi.org/10.1155/2011/841214.

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The paper refers to the numerical analysis of the internal flow in a hydraulic cross-flow turbine type Banki. A 3D-CFD steady state flow simulation has been performed using ANSYS CFX codes. The simulation includes nozzle, runner, shaft, and casing. The turbine has a specific speed of 63 (metric units), an outside runner diameter of 294 mm. Simulations were carried out using a water-air free surface model and k-εturbulence model. The objectives of this study were to analyze the velocity and pressure fields of the cross-flow within the runner and to characterize its performance for different runner speeds. Absolute flow velocity angles are obtained at runner entrance for simulations with and without the runner. Flow recirculation in the runner interblade passages and shocks of the internal cross-flow cause considerable hydraulic losses by which the efficiency of the turbine decreases significantly. The CFD simulations results were compared with experimental data and were consistent with global performance parameters.

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38

VENNELL, ROSS. "Tuning turbines in a tidal channel." Journal of Fluid Mechanics 663 (October 12, 2010): 253–67. http://dx.doi.org/10.1017/s0022112010003502.

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As tidal turbine farms grow they interact with the larger scale flow along a channel by increasing the channel's drag coefficient. This interaction limits a channel's potential to produce power. A 1D model for a tidal channel is combined with a theory for turbines in a channel to show that the tuning of the flow through the turbines and the density of turbines in a channel's cross-section also interact with the larger scale flow, via the drag coefficient, to determine the power available for production. To maximise turbine efficiency, i.e. the power available per turbine, farms must occupy the largest fraction of a channel's cross-section permitted by navigational and environmental constraints. Maximising of power available with these necessarily densely packed farms requires turbines to be tuned for a particular channel and turbine density. The optimal through-flow tuning fraction varies from near 1/3 for small farms occupying a small fraction of the cross-section, to near 1 for large farms occupying most of the cross-section. Consequently, tunings are higher than the optimal through-flow tuning of 1/3 for an isolated turbine from the classic turbine theory. Large optimally tuned farms can realise most of a channel's potential. Optimal tunings are dependent on the number of turbines per row, the number of rows, as well as the channel geometry, the background bottom friction coefficient and the tidal forcing.

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39

Popescu, Constantin, Daniela Popescu, and Bogdan Ciobanu. "Mechanical Loading System for Tests on Cross-Flow Turbines." Applied Mechanics and Materials 809-810 (November 2015): 664–69. http://dx.doi.org/10.4028/www.scientific.net/amm.809-810.664.

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Since large hydraulic turbines already have very good energy performance, nowadays the challenge is to study, improve and construct low power turbines. One important step in the design of a new type of turbine is the experimental study based on adequate equipment. In real-life applications, the turbine is loaded by the electricity consumers. Usually experiments try to reply such conditions, when it is possible and by consequence an electrical loading system seems to be adequate for tests on pico turbines. The present paper focuses on the analysis of an electrical loading system and a mechanic loading system to be used for laboratory experiments on pico turbines. The quality of experiments and the extension of graph area recommend without doubt the mechanic loading system to be used for tests on new pico hydro turbines.

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IIO, Shouichiro, Yusuke KATAYAMA, and Toshihiko IKEDA. "Investigation of Opened Cross-flow Hydraulic Turbine for Waterfall." JAPANESE JOURNAL OF MULTIPHASE FLOW 27, no. 4 (2013): 444–50. http://dx.doi.org/10.3811/jjmf.27.444.

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Latt, Khin Swe Swe, Cho Nwe Tun, and Khin Nwe Zin Tun. "Design of Runner for Cross-Flow Turbine (10 kW)." International Journal of Science and Engineering Applications 8, no. 8 (August 12, 2019): 295–97. http://dx.doi.org/10.7753/ijsea0808.1009.

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Rantererung, Corvis L., Titus Tandiseno, and Mika Mallisa. "Optimize Performance of Cross Flow Turbine with Multi Nozzle." Journal of Physics: Conference Series 1028 (June 2018): 012068. http://dx.doi.org/10.1088/1742-6596/1028/1/012068.

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Sinagra, M., V. Sammartano, C. Aricò, and A. Collura. "Experimental and Numerical Analysis of a Cross-Flow Turbine." Journal of Hydraulic Engineering 142, no. 1 (January 2016): 04015040. http://dx.doi.org/10.1061/(asce)hy.1943-7900.0001061.

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Bachant, Peter, and Martin Wosnik. "Characterising the near-wake of a cross-flow turbine." Journal of Turbulence 16, no. 4 (January 23, 2015): 392–410. http://dx.doi.org/10.1080/14685248.2014.1001852.

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TAKAO, Manabu, Kazuhiko TOSHIMITSU, Takahiro SHINKYO, Motoaki IWANARI, Masakazu HONDA, and Hideki KUMA. "418 A Cross Flow Wind Turbine with Guide Vanes." Proceedings of Conference of Chugoku-Shikoku Branch 2007.45 (2007): 149–50. http://dx.doi.org/10.1299/jsmecs.2007.45.149.

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Fiuzat, Abbas A., and Bhushan P. Akerkar. "Power Outputs of Two Stages of Cross‐Flow Turbine." Journal of Energy Engineering 117, no. 2 (August 1991): 57–70. http://dx.doi.org/10.1061/(asce)0733-9402(1991)117:2(57).

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Desai, V. R. "Discussion: Parametric Study on Performance of Cross-Flow Turbine." Journal of Energy Engineering 122, no. 3 (December 1996): 126–27. http://dx.doi.org/10.1061/(asce)0733-9402(1996)122:3(126).

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ISHIMATSU, Katsuya, and Toyoyasu OKUBAYASHI. "1019 Numerical Trial for the Cross Flow Water Turbine." Proceedings of the Fluids engineering conference 2013 (2013): _1019–01_—_1019–02_. http://dx.doi.org/10.1299/jsmefed.2013._1019-01_.

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Ormandzhiev, K., S. Yordanov, and S. Stoyanov. "Synthesis of Fuzzy Controller for Cross-Flow Water Turbine." Information Technologies and Control 15, no. 1 (March 1, 2017): 9–16. http://dx.doi.org/10.1515/itc-2017-0017.

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Abstract The paper deals with a developed mathematical model describing the operation of automatic system for controlling of cross-flow water turbine in laboratory conditions. Fuzzy governor is synthesized and the transient processes in the system are compared toward these ones during utilization of classical PD controller. The results from numerical experiment are presented in graphical form.

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Hunt, Aidan, Carl Stringer, and Brian Polagye. "Effect of aspect ratio on cross-flow turbine performance." Journal of Renewable and Sustainable Energy 12, no. 5 (September 2020): 054501. http://dx.doi.org/10.1063/5.0016753.

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