大型风力机叶片非线性流固耦合模型

A STRUCTURAL-AERODYNAMIC COUPLED METHOD FOR NONLINEAR AEROELASTIC RESPONSE OF LARGE-SCALED HAWT

基于几何精确梁理论建立叶片的非线性结构模型,基于自由涡尾迹理论建立叶片的非定常流场模型,并采用分区弱耦合方法建立大型风力机的非线性气弹模型。通过与线性模型计算结果对比验证非线性结构模型对线性结果的正确性,采用风洞实验数据验证自由涡尾迹模型的正确性。将该模型应用于NREL 5 MW的仿真计算,计算结果表明,该非线性气弹模型可以用于大型风力机在大载荷情况和考虑非定常流场的条件下的非线性响应仿真。

The nonlinear structure model of the blade was established based on the geometric precise beam theory, the unsteady flow field model of the blade was established based on the free vortex wake theory, and partition weak coupling method was used to build the nonlinear aeroelastic model of large scale wind turbine. The correctness of the results of the nonlinear structural model was verified through comparing with the calculation results of the linear model. The wind tunnel experiment data were used to verify the correctness of the free vortex wake model. The model was used for the simulation calculation of NREL 5 MW, the calculation results show that the nonlinear aeroelastic model can be used for nonlinear response simulation of large scale wind turbine under large load condition and unsteady flow field condition.