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Optimization on aerodynamic performance of blade of large horizontal axis wind energy conversion system

ZHANG Xiangdong 1,2,NIE Guohua1(1.Institute of Applied Mechanics,Tongji Univ.,Shanghai 200092,China;2.School of Civil Eng.,Hu'nan Univ.of Sci.& Tech.,Xiangtan Hu'nan 411201,China)  
To improve the conversion efficiency from wind energy to mechanical energy for wind energy conversion system,the curve of wind speed frequency and wind energy in northwest China is referred and Wilson algorithm is amended by the nonlinear distribution of optimal design attack angle along blade axis to optimize the aerodynamic performance for the blade of large horizontal axis wind energy conversion system.For the optimization design,Matlab optimization toolbox is used to optimize the iteration computation of speed induction factor to improve computation efficiency;considering various factors such as the influence of different airfoils and variant attack angle on the optimization of aerodynamic blade profile,the airfoil is amended in terms of structure and processing technology.The aerodynamic performance computation and optimum design is done on the blade profile of a 1.2 MW wind turbine generator systems,and the results indicate that the optimization design is valid and feasible and can be referred in blade profile design of wind energy conversion system.
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