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Improvement of the power extraction performance of a semi-active flapping airfoil by employing two-sided symmetric slot airfoil

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  • Zhu, Jianyang
  • Zhu, Mingkang
  • Zhang, Tao
  • Zhao, Hui
  • Wang, Chao

Abstract

Low power extraction efficiency is considered as one of the significant drawbacks of the semi-active flapping airfoil power generator (FAPG). A novel two-sided symmetric slot airfoil was employed in this work to overcome this problem. A coupled numerical method was developed and validated to simulate the interaction between the wind and flapping airfoil. Moreover, the TAGUCHI method was employed to select candidate parameters of the slot and arrange the virtual design of the numerical experiment. It is shown that the power extraction performance of the semi-active FAPG can be improved by employed slot airfoil, compared to the generator with baseline elliptical airfoil, the maximum efficiency is increased 6.01% for the generator with optimized slot airfoil. The aerodynamic behavior analysis of the airfoil showed that due to the slot, the effect lift of the airfoil is increased, therefore improves the passive rotation velocity and power extraction performance of the FAPG.

Suggested Citation

  • Zhu, Jianyang & Zhu, Mingkang & Zhang, Tao & Zhao, Hui & Wang, Chao, 2021. "Improvement of the power extraction performance of a semi-active flapping airfoil by employing two-sided symmetric slot airfoil," Energy, Elsevier, vol. 227(C).
    • Handle: RePEc:eee:energy:v:227:y:2021:i:c:s0360544221007076
    DOI: 10.1016/j.energy.2021.120458
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    References listed on IDEAS

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    1. Acarer, Sercan, 2020. "Peak lift-to-drag ratio enhancement of the DU12W262 airfoil by passive flow control and its impact on horizontal and vertical axis wind turbines," Energy, Elsevier, vol. 201(C).
    2. Teng, Lubao & Deng, Jian & Pan, Dingyi & Shao, Xueming, 2016. "Effects of non-sinusoidal pitching motion on energy extraction performance of a semi-active flapping foil," Renewable Energy, Elsevier, vol. 85(C), pages 810-818.
    3. Peng, H.Y. & Han, Z.D. & Liu, H.J. & Lin, K. & Lam, H.F., 2020. "Assessment and optimization of the power performance of twin vertical axis wind turbines via numerical simulations," Renewable Energy, Elsevier, vol. 147(P1), pages 43-54.
    4. Chen, Jian & Pan, Xiong & Wang, Canxing & Hu, Guojun & Xu, Hongtao & Liu, Pengwei, 2019. "Airfoil parameterization evaluation based on a modified PARASEC method for a H-Darrious rotor," Energy, Elsevier, vol. 187(C).
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    1. Bhavsar, Het & Roy, Sukanta & Niyas, Hakeem, 2023. "Aerodynamic performance enhancement of the DU99W405 airfoil for horizontal axis wind turbines using slotted airfoil configuration," Energy, Elsevier, vol. 263(PA).

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