Aerodynamic Shape Integrated Design of Wind Turbine Airfoils and Vortex Generators
The current design method for wind turbine airfoils and vortex generators(VGs)is independent,which cannot be used to simultaneously design wind turbine airfoils and VGs with high aerodynamic performance.Therefore,an aerodynamic shape integrated design method for wind turbine airfoils and VGsis proposed.The aerodynamic shaped VGsinstead of plate VGsare in-troduced to be installed on wind turbine blades.The blade airfoil and aerodynamic shaped VGs are both expressed by B-spline function.Then,the optimal mathematic model of wind turbine airfoil with aerodynamic shaped VGs is established,for which the multi-objective functions are maximum lift to drag ratio plus maximum lift coefficient.DU97-W-300 and CLARKY-117 air-foils are selected as initial objects to be optimized simultaneously by combining CFD simulation and particle swarm optimization(PSO)algorithm.The optimal results indicate that the maximum lift coefficient and lift to drag ratio of the optimized blade with novel VGs show the increase of 9.3%and 7.5%respectively,compared to initial design.In addition,through the comparative analysis of streamlines and vorticity contours,the new blade with novel VGs could produce larger induced vortex and could effec-tively restrain the fluid separation on the blade surface.This study provides a good reference to the design and application of wind turbine airfoils and VGs.
NETL
NSTL
万方数据
维普
