为提高垂直轴风力机运行效率，在翼型附近布置随相位角变化而主动运动的微圆柱。以NACA0021为基础翼型，采用正交试验方法对微圆柱的直径、移动距离及距弦长距离三种参数进行优化组合。通过CFD数值模拟分析主动式微圆柱对垂直轴风力机的流动控制机理。结果表明:微圆柱移动距离是影响垂直轴风力机气动性能主要因素，且当微圆柱直径为0.03c、移动距离为0.2c及距弦长为0.2c时效果最佳；主动微圆柱在中低尖速比下作用效果更明显，并能显著抑制流动分离现象，同时升高叶片转矩，进而提高垂直轴风力机气动性能。

In order to improve the operating efficiency of vertical axis wind turbines, micro-cylinder that move actively with the phase angle are arranged near the airfoil. NACA0021 is used as the base airfoil, the orthogonal test method was used to optimize the combination of three parameters: diameter, the moving distance and the distance from the chord length of the active micro-cylinder. The flow control mechanism of the active micro-cylinder on the vertical axis wind turbine is analyzed by CFD numerical simulation. The results show that the moving distance of the micro-cylinder is the main factor affecting the aerodynamic performance of the vertical axis wind turbine, and the better combination is 0.03c for the diameter of the micro-cylinder, 0.2c for the moving distance, and 0.2c for the distance from the chord; The active micro-cylinder is more effective in the middle and low tip speed ratios, and it can inhibit the flow separation phenomenon significantly, and at the same time, it can increase the blade torque, which will then improve the aerodynamic performance of the vertical axis wind turbines.

国家自然科学基金资助项目(51976131,51676131)；上海“科技创新行动计划”地方院校能力建设资助项目(19060502200)