Numerical Simulation Study on the Influence of Yaw-to-Wind Angular Velocity on Wind Turbine Aerodynamic Characteristics

Abstract

In this paper, the wind turbine of NREL 5MW wind turbine is used as the research object, and the wind turbine is simulated from yaw-to-wind angle 30°-0° at different yaw angular velocities (0.5°/s, 1°/s, 2°/s) under rated operating conditions by using the slip grid model in fluent solver and custom UDF function program. The output characteristics and aerodynamic characteristics of the wind turbine under dynamic wind conditions are studied, and the effects of yaw angular velocity and yaw-to-wind angle on the output power, and near wake speed of the wind turbine are analyzed. The results show that the smaller the yaw angular velocity of the wind turbine is, the better the output power of the wind turbine can be obtained when the yaw angular velocity is 0.5 °/s 1 °/s 2 °/s. By analyzing the wake velocity, it is found that the smaller the yaw angular velocity is, the greater the larger the wake velocity loss area is.