中文摘要：

应用ICEM-CFD建立结构化网格,采用滑移网格的方法对NREL 5MW风力机的气动性能进行了数值模拟。计算了不同风况下风力机3个叶片表面的气动载荷分布,得到不同风况下风力机的气动性能。模拟结果表明,垂直风切变风况、阵风风况对叶片表面载荷分布影响较小,风向变化风况对叶片表面载荷分布影响较大;动态来流会使风力机近尾迹涡的位置及结构发生改变;垂直风切变风况下,风机尾迹速度在4D处几乎恢复到主流速度,阵风风况下,尾迹速度在6D处几乎恢复到主流速度,风向变化风况下,尾迹速度在10D处才接近主流速度。

英文摘要：

Using ICEM-CFD software to establish structured grid, the NREL 5 MW wind turbine aerodynamic performance was studied by numerical simulation using sliding grid method. Three blade surfaces aerodynamic load distribution and aerodynamic performance of the wind turbine with different wind conditions was got through calculation. The result shows that vertical wind shear and gust of wind has less impact on blade surface load distribution, wind direction has great influence; the dynamic inflow will change the position and structure of the wind turbine near wake vortex; the wind turbine wake velocity is almost back to the mainstream velocity at 4D under vertical wind shear and the gust of wind is 6D, the wake velocity is close to mainstream velocity at 10 D under wind direction changing.