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The power extraction by flapping foil hydrokinetic turbine in swing arm mode

Author

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  • Karbasian, H.R.
  • Esfahani, J.A.
  • Barati, E.

Abstract

In the present study the power extraction capability by flapping foil hydrokinetic turbine is investigated. The heaving motion of the foil is considered in two different motion patterns including the simple linear translational motion and the rotation of swing arm on which the foil is mounted. The laminar and incompressible flow around a NACA0012 foil is conducted using Computational Fluid Dynamics (CFD) method. It is shown that the power extraction is possible and more desirable in the lower reduced frequencies. Additionally, the swing arm mode may increase the amount of extracted power and improve the performance of hydrokinetic turbine. Changes in kinematics of flapping foil alter the angle of attack profile and the local Reynolds number on the surface of the foil. These two sensitive changes influence on the sub-layer flow near to surface of the foil and make the vortex structure to be complex during flapping cycle. In the other words, in swing arm mode the vortex creation, growth, separation and shedding occur with an alternative pattern compared to simple mode. Finally, it is shown that the importance of the swing arm mode is in a certain range of swing arm lengths.

Suggested Citation

  • Karbasian, H.R. & Esfahani, J.A. & Barati, E., 2016. "The power extraction by flapping foil hydrokinetic turbine in swing arm mode," Renewable Energy, Elsevier, vol. 88(C), pages 130-142.
  • Handle: RePEc:eee:renene:v:88:y:2016:i:c:p:130-142
    DOI: 10.1016/j.renene.2015.11.038
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    References listed on IDEAS

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    Cited by:

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    5. Li, Weizhong & Wang, Wen-Quan & Yan, Yan, 2020. "The effects of outline of the symmetrical flapping hydrofoil on energy harvesting performance," Renewable Energy, Elsevier, vol. 162(C), pages 624-638.
    6. Zhu, Bing & Huang, Yun & Zhang, Yongming, 2018. "Energy harvesting properties of a flapping wing with an adaptive Gurney flap," Energy, Elsevier, vol. 152(C), pages 119-128.
    7. Liu, Zhen & Qu, Hengliang & Shi, Hongda, 2020. "Energy-harvesting performance of a coupled-pitching hydrofoil under the semi-passive mode," Applied Energy, Elsevier, vol. 267(C).
    8. Liu, Zhen & Qu, Hengliang, 2022. "Numerical study on a coupled-pitching flexible hydrofoil under the semi-passive mode," Renewable Energy, Elsevier, vol. 189(C), pages 339-358.
    9. Liu, Zhen & Qu, Hengliang & Zhang, Guoliang, 2020. "Experimental and numerical investigations of a coupled-pitching hydrofoil under the fully-activated mode," Renewable Energy, Elsevier, vol. 155(C), pages 432-446.
    10. Jiang, W. & Zhang, D. & Xie, Y.H., 2016. "Numerical investigation into the effects of arm motion and camber on a self-induced oscillating hydrofoil," Energy, Elsevier, vol. 115(P1), pages 1010-1021.
    11. Maryam Pourmahdavi & Mohammad Naghi Safari & Shahram Derakhshan, 2019. "Numerical investigation of the power extraction mechanism of flapping foil tidal energy harvesting devices," Energy & Environment, , vol. 30(2), pages 193-211, March.
    12. Wang, Bo & Zhu, Bing & Zhang, Wei, 2019. "New type of motion trajectory for increasing the power extraction efficiency of flapping wing devices," Energy, Elsevier, vol. 189(C).
    13. Karbasian, Hamid Reza & Esfahani, Javad Abolfazli & Aliyu, Aliyu Musa & Kim, Kyung Chun, 2022. "Numerical analysis of wind turbines blade in deep dynamic stall," Renewable Energy, Elsevier, vol. 197(C), pages 1094-1105.

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