STUDY ON NONLINEAR AEROELASTIC CHARACTERISITICS OF WIND TURBINE AIRFOIL UNDER TURBULENT INFLOW

Wang Su; Ma Lu; Zhang Xianfeng; Lei Xiao; Shen Xin; Du Zhaohui

doi:10.19912/j.0254-0096.tynxb.2024-1214

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (11) : 650-657. DOI: 10.19912/j.0254-0096.tynxb.2024-1214

STUDY ON NONLINEAR AEROELASTIC CHARACTERISITICS OF WIND TURBINE AIRFOIL UNDER TURBULENT INFLOW

Wang Su¹, Ma Lu², Zhang Xianfeng², Lei Xiao², Shen Xin^1,3, Du Zhaohui^1,3

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Abstract

This study takes a two-degree-of-freedom （pitching and plunging） wind turbine airfoil as the research project, for which an aeroelastic model is established. An airfoil dynamic stall model, which accounts for secondary dynamic stall vortices, is introduced as the nonlinear aerodynamic model. The effects of the aerodynamic and structural nonlinearity factors on the critical flutter speed and the post-flutter dynamic characteristics of the airfoil are analyzed under the influence of vertical turbulence. The results show that the influence of vertical turbulence on the magnitude of incoming flow velocity is weak, but it significantly disturbs the incoming flow angle of attack and causes large fluctuations in the nonlinear aerodynamic force, resulting in a lower critical flutter speed and increased vibration. Vertical turbulence destroys the synchronization of the two-degree-of-freedom vibration and changes the flutter type of the system. With increasing inflow velocity, the system vibrates more substantially, and the influence of structural nonlinearity on the aeroelastic response is more obvious.

Key words

wind turbines / airfoil / aeroelasticity / flutter / nonlinearity / turbulence

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Wang Su, Ma Lu, Zhang Xianfeng, Lei Xiao, Shen Xin, Du Zhaohui. STUDY ON NONLINEAR AEROELASTIC CHARACTERISITICS OF WIND TURBINE AIRFOIL UNDER TURBULENT INFLOW[J]. Acta Energiae Solaris Sinica. 2025, 46(11): 650-657 https://doi.org/10.19912/j.0254-0096.tynxb.2024-1214

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