为改善垂直轴风力机周围流场结构并提升气动性能，在风力机叶片中采用外吹式流动控制，并提出5种吹气控制策略，通过数值模拟的方法研究不同吹气控制策略对垂直轴风力机气动性能的影响，进一步分析在最佳吹气流动控制策略时的涡量场与载荷波动。研究表明：采用上开口抛物线控制策略时的风力机气动性能最佳，当最大吹气动量系数为0.025时，风能利用系数及平均力矩系数提升26%，并可抑制大涡的形成及发展，同时改善翼型表面压力分布。

In order to improve the flow structure and aerodynamic performance of vertical axis wind turbines,the external air-blowing flow control was applied to the blades of wind turbine and 5 different air-blowing control strategies were developed.The impact of different control strategies on vertical axis wind turbine was analyzed by numerical simulation.Then,with the optimal control strategy,vorticity field and load fluctuation have been analyzed.The result shows that the upwardparabola air-blowing control strategy with blowing momentum coefficient =0.025 is capable of increasing the power coefficient and average torque coefficient by 26% and inhibiting the production and development of large vortex,meanwhile enhancing the dissipation of vortex and improving the distribution of pressure.

TK83

国家自然科学基金(51176129，51676131)；上海市科学技术委员会项目（13DZ2260900）