| With environmental pollution and energy crisis getting more and more serious,wind power attracts extensive attention from researchers.Wind turbine blade as the core component of wind energy converter system,its performance directly affects power coefficient,components selection,regulation method and operation of wind turbine.Therefore the wind turbine blade design is one of the core researches in wind turbine technology.In this paper,a blade optimization design platform of wind turbine is presented.5 MW horizontal axis wind turbine blade is designed by this platform with different optimum goal and optimum varieties.The aerodynamic performance and structural loads of the blades are also studied here.The main contents are:(1)Use mathematical software Matlab and wind turbine simulator code FAST to build blade optimization design platform based on genetic optimization algorithm.20 k W wind turbine blade is redesigned here.Through the comparison and analysis,feasibility of the design platform is validated.(2)5 MW wind turbine blade is designed by the blade optimization design platform with blade chord length and twist angle radial distribution,tip speed ratio and number of wind turbine blade as design optimum varieties,and maximum power coefficient and lowest blade load as design optimum goals.Through analysis of aerodynamic performance,the blade geometry structure with excellent and comprehensive performance is obtained.(3)Optimized blade of 5 MW wind turbine is simplified through different engineering process.Through the comparative analysis,the best blade geometry is obtained.Then the vibration mode and load conditions of the blade are studied. |
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