Study on Aerodynamic Performance of Vertical Axis Wind Turbine with Shunt Guide Vane
To improve the aerodynamic performance of vertical axis wind turbine(VAWT),a shunt guide vane(SGV)structure with varying relative included angle was proposed.Using NACA0021 as the base airfoil,the wind energy utilization rate,single blade instantaneous torque,pressure coefficient and velocity field of VAWT under the action of shunt guide vane were numerically analyzed by computational fluid dynamics(CFD)method.The results show that both static and dynamic shunt guide vanes can im-prove the aerodynamic performance of VAWT,and the dynamic shunt guide vane can improve the aerody-namic performance more significantly;compared with static shunt guide vane,the wind energy utilization coefficient of VAWT with dynamic shunt guide vane can increase by 23%when the tip speed ratio(TSR)is 2.33.When the tip speed ratio is 2.03,the wind energy utilization coefficient of VAWT with static shunt guide vane is 37%higher than that of original VAWT;the shunt guide vane can make the optimal tip ratio move forward,stabilize blade torque fluctuation,and improve the operation stability of VAWT.