不同喷流对激波/边界层干扰控制特性对比

Comparison of Shock/Boundary Interaction Control with Different Types of Jets

采用数值模拟的方法对比研究了定常、方波脉冲、正弦脉冲这3种喷流对Ma=2流动激波/边界层干扰的控制效果,分析了不同喷流方式对受控流动流场结构、压力分布的影响.结果表明,不同喷流方式都能够实现对受控流动的有效控制,可以增大激波距离,减弱激波强度,减小激波发生器壁面压力.在控制效果方面,定常喷流效果最佳,方波脉冲喷流效果次之,但定常喷流所需要的质量流量也最大,方波脉冲质量流量次之.3种喷流的控制效果与所需质量流量的关系表明,控制收益的增加随着质量流率的增大而减小.

The numerical simulation method was used to study the control effects of the steady jet,square pulse jet and sine pulse jet on the shock/boundary interaction.The effects of different jet modes on the flow structure and the pressure distribution of the controlled flow field at Ma=2 were analyzed.The results show that different jet modes can effectively control the flow,including increasing the shock distance,weakening the shock intensity and reducing the wall pressure of the shock generator.In terms of control effect,the steady jet is the best,followed by the square pulse jet.However,the mass flow required by steady jet is also the largest,followed by the square pulse jet.The relationship between the control effects of the three jets and the required mass flow rate shows that the increase of control benefit decreases with the increase of mass flow rate.