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Flow control for VATT by fixed and oscillating flap

Author

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  • Xiao, Qing
  • Liu, Wendi
  • Incecik, Atilla

Abstract

The present study is aimed to explore the potential to improve Vertical Axis Tidal Turbine (VATT) energy harnessing efficiency by using modified blades with fixed and oscillating flap. The fixed flap concept is borrowed from its application in aerodynamics area for reaching a high lift force at low flying speed. Oscillating flap is motivated by our relevant biomimetic studies on the flapping wing propulsion or energy extraction. Present investigation is concentrated on a VATT with NACA 0018 profile blade as its baseline turbine. Numerical simulations are carried out by solving incompressible Unsteady Navier–Stokes equations at turbulence flow condition. Computed results show that under certain optimal flap geometry and flow conditions, turbine power coefficient reaches 28% enhancement as compared to the conventional blade turbine. Detailed analysis on the flow structure demonstrates that this is related to the effective flow separation suppression and vortex control by applying a fixed and oscillating flap.

Suggested Citation

  • Xiao, Qing & Liu, Wendi & Incecik, Atilla, 2013. "Flow control for VATT by fixed and oscillating flap," Renewable Energy, Elsevier, vol. 51(C), pages 141-152.
    • Handle: RePEc:eee:renene:v:51:y:2013:i:c:p:141-152
    DOI: 10.1016/j.renene.2012.09.021
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    References listed on IDEAS

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    1. Raciti Castelli, Marco & Englaro, Alessandro & Benini, Ernesto, 2011. "The Darrieus wind turbine: Proposal for a new performance prediction model based on CFD," Energy, Elsevier, vol. 36(8), pages 4919-4934.
    2. Xiao, Qing & Liao, Wei & Yang, Shuchi & Peng, Yan, 2012. "How motion trajectory affects energy extraction performance of a biomimic energy generator with an oscillating foil?," Renewable Energy, Elsevier, vol. 37(1), pages 61-75.
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    Cited by:

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    2. Rezaeiha, Abdolrahim & Montazeri, Hamid & Blocken, Bert, 2019. "Active flow control for power enhancement of vertical axis wind turbines: Leading-edge slot suction," Energy, Elsevier, vol. 189(C).
    3. Zhu, Haitian & Hao, Wenxing & Li, Chun & Ding, Qinwei & Wu, Baihui, 2018. "A critical study on passive flow control techniques for straight-bladed vertical axis wind turbine," Energy, Elsevier, vol. 165(PA), pages 12-25.
    4. Jin, Xin & Wang, Yaming & Ju, Wenbin & He, Jiao & Xie, Shuangyi, 2018. "Investigation into parameter influence of upstream deflector on vertical axis wind turbines output power via three-dimensional CFD simulation," Renewable Energy, Elsevier, vol. 115(C), pages 41-53.
    5. Jin, Xin & Zhao, Gaoyuan & Gao, KeJun & Ju, Wenbin, 2015. "Darrieus vertical axis wind turbine: Basic research methods," Renewable and Sustainable Energy Reviews, Elsevier, vol. 42(C), pages 212-225.
    6. Sun, Guang & Wang, Yong & Xie, Yudong & Lv, Kai & Sheng, Ruoyu, 2021. "Research on the effect of a movable gurney flap on energy extraction of oscillating hydrofoil," Energy, Elsevier, vol. 225(C).
    7. Zhu, Haitian & Hao, Wenxing & Li, Chun & Ding, Qinwei, 2020. "Effect of flow-deflecting-gap blade on aerodynamic characteristic of vertical axis wind turbines," Renewable Energy, Elsevier, vol. 158(C), pages 370-387.
    8. Donghai Zhou & Xiaojing Sun, 2021. "Influences of Geometrical Parameters of Upstream Deflector on Performance of a H-Type Vertical Axis Marine Current Turbine," Energies, MDPI, vol. 14(14), pages 1-14, July.
    9. Sengupta, A.R. & Biswas, A. & Gupta, R., 2019. "Comparison of low wind speed aerodynamics of unsymmetrical blade H-Darrieus rotors-blade camber and curvature signatures for performance improvement," Renewable Energy, Elsevier, vol. 139(C), pages 1412-1427.
    10. Shaaban, S. & Albatal, A. & Mohamed, M.H., 2018. "Optimization of H-Rotor Darrieus turbines' mutual interaction in staggered arrangements," Renewable Energy, Elsevier, vol. 125(C), pages 87-99.

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