[关键词]
[摘要]
为减小动态失速对垂直轴风力机气动性能的影响,提出在翼型尾缘布置动态格尼襟翼的主动流动控制方法。以直线翼垂直轴风力机为研究对象,采用非定常雷诺平均(URANS)方程进行数值求解,研究主动式格尼襟翼对垂直轴风力机气动性能的作用。结果表明:翼型尾缘采用主动式格尼襟翼,可降低垂直轴风力机最佳尖速比,提高运行稳定性,并能增大整机在低风速下的启动力矩;较原始翼型,主动式格尼襟翼可有效提高整机风能利用率,并降低叶片尾涡强度,减小脱落涡对背风区叶片的影响;当尖速比大于最佳减速比,随格尼襟翼伸出高度的增加,控制效果将逐渐减弱。
[Key word]
[Abstract]
In order to reduce the influence of dynamic stall on the aerodynamic performance of vertical axis wind turbines, an active flow control method with dynamic Gurney flaps on the trailing edge of the airfoil is proposed. Taking the linear-axis vertical axis wind turbine as the research object, the unsteady Reynolds average (URANS) equation is used to solve the numerical effect of the active Gurney flap on the aerodynamic performance of the vertical axis wind turbine. The results show that the active Gurney flap of the airfoil tail edge can reduce the optimal tip speed ratio of the vertical axis wind turbine, improve the stability of operation, and increase the starting torque of the whole machine at low wind speed; Compared with the original airfoil, the dynamic Gurney flap can effectively improve the wind energy utilization rate of the whole machine, reduce the vortex intensity of the trailing edge of the blade, and reduce the influence on the blade performance of the leeward area; When the tip speed ratio is greater than the optimum speed reduction ratio, as the height of the Gurney flap extends, the control effect will gradually decrease.
[中图分类号]
[基金项目]
国家自然科学基金项目(面上项目,重点项目,重大项目)