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

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.