定常吸气装置可有效提高垂直轴风力机气动性能,改善风轮流场结构及翼型动态失速特性。通过数值模拟,基于有限体积法对雷诺时均N-S方程进行求解,研究不同叶尖速比下定常吸气对风力机气动及流场特性的影响,对比分析原始及定常吸气作用下的风能利用率、整机转矩系数与涡量分布。结果表明：定常吸气在不同尖速比下均可显著提高风力机气动性能,减小风轮载荷波动,降低最佳叶尖速比,提高风力机运行稳定性,在最佳叶尖速比下,风能利用系数增加34.69%。定常吸气削弱了风轮叶片间尾涡脱落的影响,抑制叶片前缘涡的形成,减缓了叶片的动态失速现象,对风轮流场有良好的改善效果。

Steady suction helps to improve the aerodynamic performance of vertical axis wind turbine and improve the wind rotation field structure, so it is applied to wind wing type.Through numerical simulation, based on the finite volume method, the Reynolds time-unsteady n-s equation is solved, the influence of different blade tip speed ratios on aerodynamic and flow field characteristics of wind turbine is studied, and the wind energy utilization coefficient, the torque coefficient of the whole machine and vorticity diagram are analyzed.The results show that the steady suction significantly improves the aerodynamic performance of the wind turbine at different tip speed ratios, reduces the load fluctuation of the wind wheel, reduces the optimal blade tip speed ratio, and increases the operation stability of the wind turbine.Under the optimal tip ratio, the wind energy utilization coefficient increased by 34.69%.At the same time, steady suction weakens the interference of wake vortex shedding between blades, inhibits the formation of leading edge vortex of airfoil, avoids the dynamic stall effect of blades, and has a good improvement effect on global flow field and single blade flow field characteristic.

TK83

国家自然科学基金项目（面上项目，重点项目，重大项目）