风力机叶片气动性能及流固耦合分析

Aerodynamic Performance and Fluid-Structure Coupling Analysis of Wind Turbine Blades

采用RANS方程和SST湍流模型,在不同风速下对Tjaereborg风力机风轮进行了全三维流固耦合数值模拟,分析了流固耦合作用对风力机气动特性及风力机叶片结构特性的影响。结果表明：小风速时流固耦合作用对叶片气动性能的影响基本可以忽略;中高风速时,影响作用显著,风力机叶片会发生挥舞、摆振及扭转变形,叶尖是变形量最大的位置,叶片应力集中出现在叶展50%-85%范围内。

The full three-dimension fluid-structure coupling performance of Tjreborg wind turbine rotor under different wind speeds was investigated by solving RANS equations combined with SST turbulence model.The influence of the fluid solid interaction on the aerodynamic and structure performance was analyzed.The computed result shows that：the effect of fluid-structure coupling on the blade aerodynamic performance at low wind speed is neglectable,however at medium and high wind speed deformation of flapwise,edgewise and twist directions has notable effect on wind turbine output power.Furthermore blade tip shows the largest deformation and the stress concentration occurs in the blade spanwise 50% to 85% range.