爆炸与冲击2011，Vol.30Issue(2)：135-140,6.
激波冲击下air/SF6界面的Richtmyer-Meshkov不稳定性
Richtmyer-Meshkov instability of shock-accelerated air/SF6 interfaces
摘要
Abstract
In a shock tube, the air/SF6 interface was accelerated by the incident shock wave with the low Mach number of 1. 27. The initial sinusoidal interface was obtained by applying the polymeric membrane with the thickness of 1~2 μm and the interface evolution was monitored by using the time-resolved shadowgraph technique. The Richtmyer-Meshkov (RM) instability of the sinusoidal initial perturbation at the air/SF6 interfaces was characterized by the "spikes" of the heavy fluid (SF6) falling into the light fluid (air) and the "bubbles" of the light fluid (air) rising into the heavy fluid (SF6). Due to the Richtmyer-Meshkov (RM) instability caused by the tangential velocity difference at the air/SF6 interfaces, the heads of the "spikes" overturned into "mushroom" shapes and subsequently the "mushroom" poles broke up. And this RM instability caused the spikes to break up. The experimental disturbance amplitude is in agreement with the results by the Zhang-Sohn model and PPM simulation.关键词
流体力学/Richtmyer-Meshkov不稳定性/阴影方法/air/SF6界面/激波/激波管Key words
fluid mechanics/Richtmyer-Meshkov (RM) instability/shadowgraph technique/air/SF6 interface/shock wave/shock tube分类
数理科学引用本文复制引用
刘金宏,邹立勇,柏劲松,谭多望,黄文斌,郭文灿..激波冲击下air/SF6界面的Richtmyer-Meshkov不稳定性[J].爆炸与冲击,2011,30(2):135-140,6.基金项目
国家自然科学基金项目(11072226,10772166) （11072226,10772166）
国防科技工业技术基础科研项目(Z112009B004) （Z112009B004）
国防科技重点实验室基金项目(9140C6710011006) （9140C6710011006）
