Study on Wind Turbine Output Power Based on Fluid-solid Coupling Yaw

In order to explore the Impact mechanisms of bidirectional fluid-solid coupling and uncoupling method on the output power of wind turbine in yaw condition, based on the Glauert momentum theorem of wind turbine yaw and bidirectional fluid-solid coupling method, the output power is analyzed by combining theoretical derivation with axial flow process, the difference between coupling and uncoupled numerical method in pressure field simulation is revealed and the influence of the axial induction factor on the output power in yaw condition is quantified and the axial velocity distribution is summarized. The results show that the wind turbine output power decreases with the increase of yaw angle and is closer to the experimental power, the maximum coincidence degree is 99.4% at 10◦ of yaw angle; the axial induction factor increases with 0.5% increase with the decrease of output power, the axial induction factor of coupling method is larger than that of uncoupled method; and the axial velocity increases with the increase of yaw angle, and this trend gradually weakens along the leaf spreading direction. © 2021, Science Press. All right reserved.