仿鲸鱼鳍翼型动态气动力载荷控制研究

Load Control on a Dynamically Pitching Wind Turbine Airfoil With Bionic Wavy Leading Edge

本文将仿鲸鱼鳍前缘结构应用于风力机翼型,通过风洞实验,对动态翼型气动力进行测试,分析仿鲸鱼鳍前缘结构对风力机翼型气动力载荷的控制效果。通过实验得出以下结论:1)仿鲸鱼鳍前缘结构改善了风力机翼型静态气动力特性;2)仿鲸鱼鳍前缘结构改善了翼型动态失速特性,降低叶片极限载荷的产生;3)仿鲸鱼鳍前缘结构降低翼型动态气动力载荷的波动特性,有助于降低叶片疲劳载荷,提高叶片运行的稳定性。

In this paper,the leading-edge protuberance structure was applied to the wind turbine airfoil,and the aerodynamic load of the dynamic pitching airfoil was controlled by this passive method.The airfoil aerodynamic parameters during the dynamic pitching motion was measured through the wind tunnel experiment,and the effect of the leading-edge protuberance structure on the aerodynamic load of the wind turbine was analyzed.The following conclusions are drawn through experiments;1)The leading-edge protuberance structure improves the static aerodynamic characteristics of the wind turbine airfoil effectively;2)The leading-edge protuberance structure improves the dynamic stall characteristics of the airfoil and helps to reduce the ultimate load strength of the blade;3)The leading-edge protuberance structure reduces the fluctuation characteristics of the airfoil aerodynamic load during the dynamic process,and helps to improve the stability of the blade during operation,and prolongs the service life of the wind turbine blade.