中文摘要：

为了研究等离子体气动激励对二维气膜冷却效果的影响规律,基于等离子体气动激励唯象学模型,将等离子体气动激励对冷却气流的宏观作用等效为体积力,通过耦合求解体积力与Navier-Stokes方程,得到了气膜冷却的流场和温度场特性。计算结果表明：气膜缝出口壁面附近冷流经过等离子体气动激励作用后,速度水平分量提高较大,竖直分量提高较小;随着吹风比的增大,气膜缝出口冷流的流量和动量增加,气膜冷却效率增加,但等离子体气动激励对冷却气流的影响减弱,气膜冷却效率增加量减小。施加等离子体气动激励后,在各吹风比下,随着气膜缝倾角的增加,气膜冷却效率逐渐降低;等离子体气动激励等效体积力大小对气膜冷却效果有较大影响,气膜冷却效率随体积力的增大先升高后降低,存在一个最佳等效体积力值。

英文摘要：

Based on the phenomenology model of plasma aerodynamic actuation,a macroscopic effect of plasma aerodynamic actuation on fluid is equivalent to body force vector.Mechanism analysis of the effect rule of plasma aerodynamic actuation on 2Dfilm cooling is studied by coupled solution of body force with Navier-Stokes equation.The results show that after the cool flow is subject to the plasma aerodynamic actuation near the wall at the exit of film slot,the horizontal velocity component increases greatly while the vertical velocity component gains a little.When the blow ratio increases,the momentum and flux of cool flow and the film cooling effectiveness increase,while the influence of plasma aerodynamic actuation on cooling flow and the increment of film cooling effectiveness decrease.Under the plasma aerodynamic actua-tion,the film cooling effectiveness decreases when film slot inclination angle increases at each blow ratio.Plasma aerodynamic actuation body force has large impact on film cooling effectiveness,the film cooling effectiveness increases and then decreases with the increase of magnitude of body force,there exists an optimal body force magnitude.