波后滑移线引起的界面变形和R-M不稳定性  

Experimental Study of Interfacial Perturbation Originated from the Slip Lines and R-M Instability with Reshock

作　　者：刘金宏[1] 廖深飞 黄熙龙 邹立勇[1] LIU Jin-hong;LIAO Shen-fei;HUANG Xi-long;ZOU Li-yong(National Key Laboratory of Shock Wave and Detonation Physics Institute of Fluid Physics CAEP ,Mianyang 621900 , China)

机构地区：[1]中国工程物理研究院流体物理研究所冲击波物理与爆轰物理重点实验室,四川绵阳621900

出　　处：《气体物理》2018年第1期34-40,共7页Physics of Gases

基　　金：国家自然科学基金(11772309;11472253);科学挑战专题(TZ2016001);冲击波物理与爆轰物理重点实验室基金(9140C670801150C67292)

摘　　要：实验研究复杂波形结构引起平面界面变形和反射激波冲击下的R-M不稳定性的问题.在竖直激波管中生成稳定的N_2/SF_6平面界面,激波在圆柱绕射后,冲击平面界面,由此研究复杂激波引起的界面变形.平面激波在圆柱绕射后的流场,演化成具有初始入射波、三波点、弯曲反射波、Mach波和Mach反射产生的滑移线等复杂结构.研究复杂结构激波对界面的作用,对认识界面扰动的生成具有较大帮助.绕柱激波冲击后,平面界面仅在两对滑移线内部发生变形.绕柱激波冲击界面后,两对滑移线将界面分成"内界面"和"外界面",界面变形形态同滑移线和界面相交位置相关.反射激波二次冲击下,界面扰动的增长与Jacobs-Sheeley涡量模型较吻合.Experimental study,on the interfacial perturbation originated from the complex structure of shock waves and the developments of Richtmyer-Meshkov instability by reshock,is presented. The motionless and stable N2/SF6 interface is formed in a vertical shock tube. The planar shock wave diffracted over a rigid cylinder,interaction with the flat interface,so the interfacial perturbation originated from the complex shock wave is studied. The interaction fields of shock waves with cylinder are complex,including the primary incident shock,triple point,reflected bow shock,Mach shock,slip lines originated from the triple Mach shock. The understanding of interaction of complex shock wave with planar interface,will contribute to the knowledge of the perturbation originated from the complex flow. After diffracted shock wave had transmitted at interface,the interface is divided into ″inner interface″ and ″outer interface″ by the first and the second slip lines. Experimental result shows a clear correlation between the form of interfacial perturbation and distance,which is between the point of intersection of the slip lines and the interface. Good agreement is found between the interfacial perturbation measurements with reshock and the Jacobs-Sheeley vortex model..

关 键 词：激波管 R-M不稳定性 绕射激波 滑移线 反射激波 

分 类 号：O357.5[理学—流体力学]