摘要
翼型前缘设置旋转圆柱能够有效抑制大攻角下的流动分离,提高翼型升阻比。本文采用在垂直轴风力机叶片前缘加旋转圆柱的流动控制方法,研究此方法对垂直轴风力机气动性能的影响。结果表明:前缘旋转圆柱转速比和圆柱尺寸对翼型升阻特性影响显著,随着转速比和尺寸的增大,翼型上下表面压差逐渐增大,上表面分离区逐渐消失,升阻比得到提升。叶片前缘加旋转圆柱后,风力机的最大净风能利用率相比传统垂直轴风力机有所提升,且尖速比越小,前缘旋转圆柱对风能利用率的提升越显著。
Setting a rotating cylinder on the leading edge of the airfoil can effectively inhibit flow separation at high angles of attack and improve the lift-drag ratio of the airfoil. In this paper, the flow control method of adding a rotating cylinder to the leading edge of the vertical axis wind turbine blade is used to study the influence of this method on the aerodynamic performance of the vertical axis wind turbine. The results show that the rotational speed ratio and cylinder size of the leading edge rotating cylinder have significant effects on the lift-drag characteristics of the airfoil. With the in-crease of the speed ratio and size, the pressure difference between the upper and lower surfaces of the airfoil gradually increases, and the separation area on the upper surface of the airfoil gradually disappear, lift-to-drag ratio is improved. After adding a rotating cylinder to the leading edge of the blade, the maximum net wind energy utilization rate of the wind turbine is improved compared with traditional vertical-axis wind turbines, and the smaller the tip speed ratio, the more significant the improvement of the wind energy utilization rate of the leading edge rotating cylinder.
出处
《建模与仿真》
2021年第2期277-291,共15页
Modeling and Simulation
