分流导叶垂直轴风力机气动性能研究

为提高垂直轴风力机气动性能，提出一种随相位角变化而改变相对夹角的分流导叶结构。以NACA0021为基础翼型，采用计算流体力学方法对分流导叶作用下垂直轴风力机风能利用系数、单叶片瞬时转矩、压力系数及速度场进行数值分析。结果表明：静态和动态分流导叶均可提高垂直轴风力机气动性能，且动态分流导叶提升效果更为显著；相较于静态分流导叶，动态分流导叶垂直轴风力机在尖速比为2.33时风能利用系数最高可提升23%，在尖速比为2.03时静态分流导叶垂直轴风力机较原始垂直轴风力机风能利用系数提高37%；分流导叶也可使最佳尖速比前移，稳定叶片转矩波动，提升垂直轴风力机的运行稳定性。

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 improve the aerodynamic performance of VAWT, and the dynamic shunt guide vane can improve the aerodynamic performance more significantly; compared with static shunt guide vane, the wind energy utili〖JP2〗zation 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.