关键词: 三维壁面鼓包;等离子体合成射流;唯象仿真;分离;流动控制

Abstract: In order to further improve the performance of the bump inlet， a phenomenological simulation method was used to study the effects of the plasma jet on the bump-induced flow field under supersonic conditions. The effectiveness of the plasma synthetic jet control method was verified， and the influence of parameters such as the slit width of the actuator on its control effect was obtained. It is found that in the supersonic flow field， the induced shock formed by the plasma synthetic jet gradually develops from a symmetrical bow shock to an oblique compression wave. For an actuator with a slit width of 2mm， the effective time of the action of the plasma synthetic jet is a quarter cycle. During this time， it can suppress the shock surface induced by the bump， promote the bump to remove the boundary layer， and bring the separation point ahead of time， weaken the separation intensity， and make the boundary layer fuller. The parametric research on the slit width of the actuator shows that as the slit width increases， the jet outlet pressure increases， the action time increases， and the control effect of the jet on the bump displacement within the effective control time is enhanced. Jets in the wide range of slits explored can reduce the wall resistance by up to 3.2%.

Key words: Three-dimensional surface bump;Plasma synthetic jet;Phenomenological simulation;Separation;Flow control