基于合成射流风力机翼型气动特性的数值模拟

摘要

在翼型上引入射流，以较小流动干扰对翼型表面绕流进行主动流动控制，从而达到延迟失速、抑制分离、增升减阻的目的。通过数值模拟方法，分析了合成射流中的参数射流偏角、动量系数和无量纲频率对翼型气动特性的影响。结果表明，合理地选择射流参数可以达到抑制翼型流动分离、实现增升减阻的目的，得出了相关参数与翼型特性之间的关系曲线，为下一步射流器的选择与控制提供了一些有意义的帮助。%By introducing jets on the airfoil for active flow control,which can make smaller flow disturbance around its surface, delayed stall,inhibit separation,lift drag reduction are achieved. In this paper,the key parameters of the synthetic jet such as jet an-gle,the momentum coefficient and dimensionless frequency,are studied by using numerical simulation method,in order to find out how airfoil aerodynamic characteristics is affected. The results show that reasonably chosen jet parameters can inhibit airfoil flow sepa-ration to enhance drag lift. The related curves between the relevant parameters of the synthetic jet and the airfoil characteristics are ob-tained in this article,providing some meaningful helps for the subsequent jet selection and control.