斜爆轰的胞格结构及横波传播  

Cellular structure of oblique detonation and propagation of transverse wave

作　　者：王爱峰[1] 赵伟[1] 姜宗林[1] 

机构地区：[1]中国科学院力学研究所高温气体动力学重点实验室,北京100190

出　　处：《爆炸与冲击》2010年第4期349-354,共6页Explosion and Shock Waves

摘　　要：针对30°楔角的驻定斜爆轰特性,选择在临界爆轰马赫数附近6.8、7.0与7.5等3种不同马赫数来流状态进行数值分析。在马赫数为6.8、7.0状态下,在斜激波(oblique shock wave,OSW)、斜爆轰波(oblique detonation wave,ODW)与爆燃波交汇处形成的三波点后形成一道激波,在楔面上反射,并透过接触间断面与爆轰波阵面产生的横波相互作用,使得下游流场发生扰动,形成不规则的胞格结构。斜爆轰波阵面产生的横波呈现上游单向传播与下游双向传播同时并存的现象,对斜爆轰的稳定性产生了影响。Numerical simulations were carried out to investigate the characteristics of standing oblique detonation wave （ODW） for different Mach 6.8, 7.0 and 7.5 inlet flows over a wedge of 30° turning angle. Numerical results show a shock wave at Mach 6.8 and 7.0 appears at the downstream of the triple point which is formed among oblique shock wave （OSW）, ODW and deflagration wave, reflects from the wedge wall, passes across the contact surface and interacts with transverse waves which originating from the ODW front. This interaction makes cellular structure irregular and complex. At the same time, a new feature shows the transverse waves propagate both in one-way direction upstream and in two-way direction downstream behind the ODW. The propagation characteristic affects the stability of oblique detonation wave.

关 键 词：爆炸力学 胞格结构 波阵面 斜爆轰波 横波 

分 类 号：O381[理学—流体力学]