Research On RM Instability Of Shock Bubbles Impacted By Shock Waves

In recent decades,in the academic and engineering fields,with the gradual promotion of technical conditions and the increasing demand of many fields,including inertial confinement fusion,the research of RM instability has been paid more and more attention.Scientists at home and abroad have also done a lot of work on RM instability.In this paper,the numerical method is used to simulate the deformation development process of the interface after shock wave interface in a variety of cases,in order to get a deep understanding of the RM instability,and try to describe,analyze and explain the appearance and development process of RM instability.The advantages and disadvantages of the numerical methods used are summarized and evaluated.In this paper,the Clawpack software package is used as a platform to track the interface by using the VOF method and the interface function simply.The two order precision ROE scheme based on the finite volume method is used to construct the parameter flux,and the flux limiter is used to suppress the non physical oscillation near the interface,and the material interface obtained by solving the near Riemann problem is solved.Parameters are used to define the parameters of the virtual flow node.Through the exact solution of the governing equations of the two-dimensional Euler equation and the fluid volume transport equation,the dynamic process of the compressible flow of different media under the action of the weak shock wave is solved.In this paper,we mainly study the instability of shock wave interaction with three kinds of experimental gases,helium,argon and six sulfur fluoride.This paper first introduces the method of experimental research,including the brief introduction and history of shock tube,the physical display of the experimental equipment,the principle and method of using the knife edge to shoot the schlieren map,and describes the requirements and adjustment methods of the experimental optical path,and introduces the concept of the high-speed photography system.The experimental results are then analyzed and compared with the numerical results.In this paper,a series of studies have been carried out to obtain certain numerical results of shock wave impinging bubbles.Combined with the experimental results and relevant conclusions both at home and abroad.Through this study,we can deepen our understanding of this kind of physical problems,and lay a foundation for further research.At the same time,the reliability of the program is verified by comparison,and reliable experimental data and methods are obtained,which is of great significance for future research.