偏航工况下水平轴风力机叶片气动变形数值模拟研究

Numerical study on horizontal wind turbine blades deflections under yaw conditions

以非定常叶素动量方法和水平轴风力机结构动力学为基础,建立风力机气弹计算的仿真程序,将偏航模型耦合进气弹程序中,针对某5 MW水平轴风力机进行仿真计算,分析比较了该风力机在不同偏航角工况下叶片变形沿径向和周向的分布情况,总结了不同偏航工况对风力机叶片变形的影响规律。研究结果对风力机叶片设计和疲劳寿命的预测有一定的指导意义。

Based on unsteady BEM （Blade Element Momentum） and structural dynamics of wind turbines, a aeroelasticity simulation program for horizontal axis wind turbines is built. Coupling the simulation program and a wind turbine yaw model together, the flapwise and edgewise deflections of 5 MW horizontal axis wind turbine rotating blades are calculated. The deflections of blades along the radial and circumferential direction under different yaw angles are presented and compared in this study. Finally the law of deflections of wind turbine blades is summarized under different yaw conditions in this paper. The results of this study have some significance to wind turbine blade design and the fatigue life prediction.