背景波系下的隔离段激波串运动特性及其流动机理研究进展

Recent research progress on motion characteristics and flow mechanism of shock train in an isolator with background waves

对高超声速进气道-隔离段激波串在复杂背景波系下的突跳运动特性及其流动机理的最新研究进展进行了综述,涵盖了背景波系作用下的激波串运动特性、突跳机理和突跳运动特性的数学描述方法,以期对高超声速进气道相关研究工作提供一定的参考。首先,对固定背景波系和变化背景波系下的激波串运动特性和突跳机制进行阐述,指出隔离段壁面压力顺压力梯度和逆压力梯度的交替变化是激波串突跳特性产生的内在物理机制。其次,对背景流场下隔离段激波串突跳运动的触发机理和触发条件进行了讨论。最后,基于对运动特性和突跳机制的认识,尝试给出了背景波系作用下的隔离段激波串运动特性的数学模型,为激波串前缘位置控制提供参考。

The present paper aims to provide a summary report on recent research progress about motion characteristics and flow mechanism of a shock train in a hypersonic inlet-isolator with complex background waves to help the researchers working on hypersonic inlet-isolator easily with their further work. It covers shock train motion characteristics, mechanism of a shock train jumps, and the method for the model of a shock train jumps with complex background waves. At first, the investigations for the motion characteristics of shock train with fixed or variable background waves are described, which point out that the boundary layer separation caused by the alternating favorable or adverse pressure gradient in the isolator is the physical mechanism of the shock train motion characteristics. Followed, the triggering mechanism and condition of shock train jumps in an isolator with background waves are discussed. At last, based on the understanding of the motion characteristics and jump mechanism, the method for the mathematical model of the shock train motion in an isolator with background waves is given to provide a reference for the control of the shock train leading edge.