A study of wind turbine blades optimization based on a rotational speed control model

The National Renewable Energy Laboratory (NREL) Phase II - IV wind turbine rotors^[1] were used as the original research subjects in this article. In this paper, the numerical simulation method and business software FLUENT were used. The aerodynamic performances of different fixed-pitch, horizontal-axis wind turbine rotors were obtained through numerical computation. A rotational speed control model was given by direct calculation on the aerodynamic parameters of straight blades. As in the previous model, it required the wind turbine rotational speed be changed as little as possible in consideration of the life expectancy improvement and dynamo size reduction. Then, numerical simulation was used in one twisted wind turbine blade, three simple twist-oriented corrected models were acquired by flow-field analysis and simplified blade element theory application. Certain improvements in the wind turbine aerodynamic performances were obtained by contrasts of P-V curves and rotational speed model with original twisted wind turbine blade.