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Experimental investigation on Aeroelastic response of long flexible blades in turbulent flow

Author

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  • Wang, Xiangjun
  • Jiang, Lifeng
  • Amjad, Ali
  • Yang, Hua
  • Yang, Junwei

Abstract

Wind turbine blades in wind farms often exhibit damage in extreme turbulence generated by typhoons, tornadoes, and canyon winds. To address this issue, a continuous aerodynamic elastic scaled blade is machined and manufactured, and a multi parameter study is conducted on the aerodynamic elastic response of blades under different turbulence intensities by modulating wind fields with grids. The impact of turbulence intensity on the wind-induced vibration characteristics of flexible blades under wind turbine shutdown conditions is investigated. Moreover, the influence of different turbulence on the frequency domain characteristics of blades is analyzed. The interaction mechanism between blades and turbulent flow field is thoroughly explored. The experimental results indicate that the aerodynamic elastic response of blades is closely related to turbulence intensities, specific performance as follows: Firstly, the root mean square acceleration of the scaled blade is positively correlated with turbulence intensity, while the vortex-induced vibration in the flapwise direction of the scaled blade is negatively correlated with turbulence intensity. Moreover, the turbulence intensity alleviates the frequency locking vibration caused by the excitation vibration during the feathering process, and reduces the amplitude of blade vortex induced vibration. This study provides reference for designing the large-scale wind turbines with long flexible blades in coastal, offshore and mountainous areas.

Suggested Citation

  • Wang, Xiangjun & Jiang, Lifeng & Amjad, Ali & Yang, Hua & Yang, Junwei, 2024. "Experimental investigation on Aeroelastic response of long flexible blades in turbulent flow," Applied Energy, Elsevier, vol. 375(C).
    • Handle: RePEc:eee:appene:v:375:y:2024:i:c:s0306261924014922
    DOI: 10.1016/j.apenergy.2024.124109
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    References listed on IDEAS

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