中文摘要：

风能利用的主要方式是风力发电，风力机桨叶翼型的气动特性直接影响风力发电的效率。利用CFD（Computational Fluid Dynamics）软件对风力机常用的翼型NACA4415进行了数值模拟仿真研究，探讨了风力机叶桨翼NACA4415的空气动力特性，得出了在不同攻角下的升阻力随攻角变化的特性曲线并进行了分析，研究了大攻角28°时扰流翼型的流场．分析了大攻角失速时的流场分布。

英文摘要：

The main titan of wind energy utilization is wind powel, and the wind power generaiion is directly affected by the wind turbine paddle aerodynamic characteristics. The commonly wind turbine airfoil NACA4415 is numerical simulated and studied by the use of computational fluid dynamics （CFI）） software. The aerodynamic charaeteristies of the wind turbine airfoil are studied. At different angles of attack, the eharacterislies curve about the lift and drag along with the change of angle of attack are obtained and analyzed. The large angle of altack at 28 degree dislufl）ed tlow airfoil tlow fieht is studied on and the flow field distribution in the large attack angle stall is analyzed.