Aerodynamic analysis and optimization of model test blade for floating wind turbine

作者：Du, Weikang; Zhao, Yongsheng; Wang, Mingchao; He, Yanping

来源：Acta Energiae Solaris Sinica, 2014, 35(10): 1923-1929.

• Basin modeling
• Blade-element momentum methods
• Floating wind turbines
• National Renewable Energy Laboratory
• Optimization modeling
• Optimization variables
• Rotor thrust
• Scale effects

In the wave basin model test of floating wind turbine, Froude scaling law should firstly be applied. However, the inconsistency in the scaling of Reynolds number, which is widely known as scale effect, makes the rotor thrust in model test far less than the target thrust scaled by the Froude law. A 5 MW wind turbine of the National Renewable Energy Laboratory(NREL-5 MW)was used as prototype, and model turbine had a scaling factor of 1∶50. By utilizing the Blade Element Momentum Method(BEM method), the rotor thrust of both prototype turbine and model turbine were calculated and analyzed. In order to improve the rotor thrust of the model turbine, airfoil types of the blade cross sections were adjusted. On basis of the adjustment of model blade, an optimization model for the rotor thrust was built by choosing the blade chord length and twist angle as optimization variables. The pattern search method and penalty method were selected to solve the optimization model. It was found that the optimal designed model blade matched the target rotor thrust well, thus it could be served as a better reference for the floating wind turbine model test in the wind and wave basin.

• 出版日期2014
• 单位上海交通大学