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Optimization of cycloidal water turbine and the performance improvement by individual blade control


  • Hwang, In Seong
  • Lee, Yun Han
  • Kim, Seung Jo


This paper investigates an advanced vertical axis turbine to enhance power generation from water energy. The turbine, known as a cycloidal water turbine, is a straight-bladed type adopting a cycloidal blade system that actively controls the rotor blades for improved turbine efficiency, according to the operating conditions. These characteristics enable the turbine to self-start and produce high electric power at a low flow speed, or under complex flow conditions. A parametric study has been carried out by CFD analysis, with various characteristics including different number of blades, chord length variations, variety of tip speed ratios, various hydrofoil shapes, and changing pitch and phase angles. Optimal parameters have been determined, and the performance of the turbine has achieved approximately 70% better performance than that of a fixed pitch turbine. An experimental study has also been carried out which shows that the results correlate quite well with the theoretical predictions although the power output was reduced due to the drag forces of the mechanical devices. Another numerical optimization was carried out to improve the rotor performance by adopting an individual blade control method. Controllable pitch angles were employed to maximize the rotor performance at various operating conditions. The optimized result obtained using genetic algorithm and parallel computing, shows an improvement in performance of around 25% compared with the cycloidal motion.

Suggested Citation

  • Hwang, In Seong & Lee, Yun Han & Kim, Seung Jo, 2009. "Optimization of cycloidal water turbine and the performance improvement by individual blade control," Applied Energy, Elsevier, vol. 86(9), pages 1532-1540, September.
  • Handle: RePEc:eee:appene:v:86:y:2009:i:9:p:1532-1540

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    Cited by:

    1. Grogan, D.M. & Leen, S.B. & Kennedy, C.R. & Ó Brádaigh, C.M., 2013. "Design of composite tidal turbine blades," Renewable Energy, Elsevier, vol. 57(C), pages 151-162.
    2. Miller, Aaron & Chang, Byungik & Issa, Roy & Chen, Gerald, 2013. "Review of computer-aided numerical simulation in wind energy," Renewable and Sustainable Energy Reviews, Elsevier, vol. 25(C), pages 122-134.
    3. Trivellato, F. & Raciti Castelli, M., 2014. "On the Courant–Friedrichs–Lewy criterion of rotating grids in 2D vertical-axis wind turbine analysis," Renewable Energy, Elsevier, vol. 62(C), pages 53-62.
    4. Mohamed, M.H., 2013. "Impacts of solidity and hybrid system in small wind turbines performance," Energy, Elsevier, vol. 57(C), pages 495-504.
    5. Goundar, Jai N. & Ahmed, M. Rafiuddin, 2013. "Design of a horizontal axis tidal current turbine," Applied Energy, Elsevier, vol. 111(C), pages 161-174.
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    9. Bakhshandeh Rostami, Ali & Fernandes, Antonio Carlos, 2015. "The effect of inertia and flap on autorotation applied for hydrokinetic energy harvesting," Applied Energy, Elsevier, vol. 143(C), pages 312-323.
    10. Jaohindy, Placide & McTavish, Sean & Garde, François & Bastide, Alain, 2013. "An analysis of the transient forces acting on Savonius rotors with different aspect ratios," Renewable Energy, Elsevier, vol. 55(C), pages 286-295.
    11. Rourke, Fergal O. & Boyle, Fergal & Reynolds, Anthony, 2010. "Marine current energy devices: Current status and possible future applications in Ireland," Renewable and Sustainable Energy Reviews, Elsevier, vol. 14(3), pages 1026-1036, April.
    12. Li, Chao & Zhu, Songye & Xu, You-lin & Xiao, Yiqing, 2013. "2.5D large eddy simulation of vertical axis wind turbine in consideration of high angle of attack flow," Renewable Energy, Elsevier, vol. 51(C), pages 317-330.
    13. Paillard, B. & Hauville, F. & Astolfi, J.A., 2013. "Simulating variable pitch crossflow water turbines: A coupled unsteady ONERA-EDLIN model and streamtube model," Renewable Energy, Elsevier, vol. 52(C), pages 209-217.
    14. Mohamed, M.H., 2012. "Performance investigation of H-rotor Darrieus turbine with new airfoil shapes," Energy, Elsevier, vol. 47(1), pages 522-530.
    15. Schleicher, W.C. & Riglin, J.D. & Oztekin, A., 2015. "Numerical characterization of a preliminary portable micro-hydrokinetic turbine rotor design," Renewable Energy, Elsevier, vol. 76(C), pages 234-241.
    16. Yang, Min-Hsiung & Huang, Guan-Ming & Yeh, Rong-Hua, 2016. "Performance investigation of an innovative vertical axis turbine consisting of deflectable blades," Applied Energy, Elsevier, vol. 179(C), pages 875-887.


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