【摘要】 基于CFD及有限单元法，利用ANSYS Workbench平台的Fluent与Transient Structural模块，对NREL 5 MW风电机组复合材料叶片在极端运行阵风下的气动特性及结构力学特性进行研究。结果表明：风轮气动载荷受极端运行阵风的影响较大，极端运行阵风作用下，风力机转矩及轴向推力等随风速的变化出现较大幅值的响应且响应峰值较阵风峰值均有所提前；叶片位移随风速的变化在峰值风速的前后出现大小两个峰值；在风速达到峰值时，与均匀来流阶段相比，叶片表面应力整体增幅较大。更多还原

【Abstract】 Based on CFD and finite element method, the aerodynamic characteristics and structural mechanical properties of the NREL 5 MW wind turbine composite blade under extreme operating gusts are studied by using Fluent and Transient Structural modules of ANSYS Workbench platform. The results show that aerodynamic loads of the wind turbines are greatly affected by the extreme operating gust. Under the extreme operating gust, the torque and axial thrust of the wind turbine have a large respond greatly with the change of wind speed, and the peak value of the response is earlier than that of the gust. The blade displacement with the change of wind speed appears two peaks before and after the peak of wind speed. When the wind speed reaches the peak, the surface stress of the blade increases greatly compared with that of the uniform-stream stage.更多还原