广义Richtmyer-Meshkov不稳定性研究进展  

Research progress of general Richtmyer-Meshkov instability

作　　者：邹立勇[1] 吴强[1] 李欣竹[1] ZOU LiYong;WU Qiang;LI XinZhu(Key Laboratory of Shock Wave and Detonation Physics,Institute of Fluid Physics,China Academy of Engineering Physics,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,绵阳621900

出　　处：《中国科学：物理学、力学、天文学》2020年第10期2-13,共12页Scientia Sinica Physica,Mechanica & Astronomica

基　　金：国家自然科学基金重大研究计划重点项目(编号:91952205);科学挑战专题(编号:TZ2016001)资助项目。

摘　　要：Richtmyer-Meshkov(RM)不稳定性广泛存在于学术界和工程应用的诸多领域,具有重要的研究背景和意义.过去的研究大多局限于均匀激波冲击初始扰动界面诱导的经典RM不稳定性情形.近年来,非均匀扰动激波冲击物质界面诱导的广义RM不稳定性方向,受到了学术界的关注,其实验研究和数值模拟等方面取得了许多进展.本文回顾了广义RM不稳定性研究方法的发展过程,总结介绍了三种实验方法和三套数值模拟程序,对比展示了这些方法及程序在广义RM不稳定性研究方面获得的图像结果和深入分析,具体包括平面和汇聚两种几何构型下,界面演化的激波形状、激波强度、界面密度比等多种效应,以及在演化机理和理论模型方面取得的进展.针对目前研究的局限性,本文提出了未来研究的重要方向:广义RM演化晚期湍流混合与经典RM晚期的异同、极端条件下实验、先进诊断技术、理论计算和内在物理机制.Richtmyer-Meshkov(RM)instability has attracted wide attention due to its academic significance and engineering application in many fields.Previous studies show majority of research on shock-induced interface instability dealt with the classic RM instability(referring to the uniform incident shock interacting with initially perturbed interface)which followed after Richtmyer’s seminal work.In recent decades,much interest has been paid to the generalized RM instability(standing for the rippled incident shock interacting with material interface)and great progresses have been achieved through experimental and numerical investigations.In this article,we review the developments of methods used to study generalized RM instability.Three kinds of experimental method and three sets of numerical codes are introduced.Images obtained by those methods and post treatment analysis are presented,including the incident shock shape,shock strength,density ratio effects and physical mechanism and theoretical model on the evolution of generalized RM instability in both planar and convergent geometry cases.Finally,based on the limitation of current studies,we propose the following four directions for future study:comparison of turbulent mixing processes induced by general and classic RM instability;general RM experiment at extremes;advanced diagnostic techniques;theory,computation and underlying mechanism.

关 键 词：经典RM不稳定性 广义RM不稳定性 激波 界面 压力扰动 

分 类 号：O354.5[理学—流体力学]