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Effects of trailing-edge movable flap on aerodynamic performance and noise characteristics of VAWT

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  • Liu, Qingsong
  • Miao, Weipao
  • Li, Chun
  • Hao, Winxing
  • Zhu, Haitian
  • Deng, Yunhe

Abstract

Efficiency enhancement and noise reduction are the two critical factors in the wind turbine design. In this paper, the effects of trailing-edge flap on the aerodynamic performance and noise characteristics of NACA0018 airfoil and vertical axis wind turbine (VAWT) were investigated, and the geometric parameters including flap angle, flap position and flap length were considered. The aerodynamic performance was simulated with the Detached-Eddy Simulation (DES) based on Spalart-Allmaras turbulence model and noise characteristics is calculated by CFD combined with Ffowcs-Williams and Hawkings (FW-H) acoustic analogy method. The research results indicate that the trailing-edge flap could effectively suppress flow separation and reduce the airfoil noise at high angle of attack (AOA). The optimum flap parameters obtained by orthogonal experimental design (OED) method were applied in VAWT, and it was observed that the trailing-edge flap could significantly improve the power coefficient at high tip-speed ratio (TSR) and reduce the VAWT noise. The research in this paper provided a comprehensive reference for improving the dynamic stall characteristics and reducing the noise of VAWT in practical engineering applications.

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  • Liu, Qingsong & Miao, Weipao & Li, Chun & Hao, Winxing & Zhu, Haitian & Deng, Yunhe, 2019. "Effects of trailing-edge movable flap on aerodynamic performance and noise characteristics of VAWT," Energy, Elsevier, vol. 189(C).
    • Handle: RePEc:eee:energy:v:189:y:2019:i:c:s0360544219319668
    DOI: 10.1016/j.energy.2019.116271
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    References listed on IDEAS

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