Aerodynamic damping analysis of horizontal axis wind turbine blade in steady stall
By analyzing on steady aerodynamic forces on an airfoil section of the wind turbine blade, combining with the blade modal analysis of the structural dynamics, a model for analyzing steady aerodynamic damping of wind turbine blade was established. Then, based on the accurate calculation on the aerodynamic damping of an airfoil section and a single blade, an effective analysis method of aerodynamic damping was established, and the key parameters which influence aerodynamic damping change were researched. Taking the negative aerodynamic damping which can easily initiate stall vibration of blade as the key point of the research, using a typical blade model as a sample, calculating on it, this paper modifies the parameters of blade model according to the established analysis method of aerodynamic damping. So that the negative aerodynamic damping in stall situation is improved, these can offer a more accurate realistic basis for aerodynamic optimization and vibration restraining design of wind turbine blade.
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