放电频率对DBD气动激励影响的数值分析  

Numerical analyzed the effect of discharge frequency on DBD plasma aerodynamic actuation

作　　者：程钰锋[1] 聂万胜[1] 车学科[1] 

机构地区：[1]中国人民解放军装备指挥技术学院,北京101416

出　　处：《科学通报》2012年第23期2164-2170,共7页Chinese Science Bulletin

基　　金：国家自然科学基金(51076168)资助

摘　　要：基于数值方法分析了DBD等离子体对翼型失速特征的改善效果,研究了不同放电频率对等离子体气动激励的影响.通过计算发现,采用DBD等离子体流动控制技术能够有效地抑制低雷诺数大攻角下翼型的动态失速特征.静止空气中,等离子体诱导速度随放电频率的增大先增大后减小,振荡频率的变化规律不明显,但在放电频率为无控制时翼型表面涡脱落频率的倍频和不是涡脱落倍频两种情况下,振荡频率分布随放电频率的增大而增大.采用等离子体抑制气动分离后,翼型升阻比随放电频率的增大先增大后趋于平缓,但不同放电频率下翼型气动力大小的变化很小;翼型气动力振荡频率随放电频率的变化较大,变化规律与静止空气中等离子体诱导速度的振荡频率相同.The effect of dielectric barrier discharge （DBD） plasma to enhance the aerodynamic characteristics of an airfoil was numerical studied, and the effect of different discharge frequencies on the DBD plasma aerodynamic actuation was analyzed. The results show that DBD plasma flow control could restrain the flow separate phenomena at low Re condition. As the discharge frequency increased, the plasma induced flow velocity will increase first and then decrease. But the velocities oscillating frequencies change in no rules. The velocities oscillating frequencies will increase as the discharge frequencies increase at the range of multiple frequencies of vortex break off frequency or not. The lift drag ratio of airfoil will increase as the discharge frequencies increase, but the difference is tiny in different cases with different discharge frequencies. The oscillate frequencies of airfoil aerodynamic change in a big range as the discharge frequencies changed, and it have the same rule as the velocities oscillate frequencies in the air.

关 键 词：介质阻挡放电 等离子体 气动激励 放电频率 增升减阻 

分 类 号：O461.2[理学—电子物理学]