多模RM不稳定性在湍流混合形成、惯性约束核聚变中具有重要的学术及应用价值。本申请提出在激波管中开展平面激波诱导多模扰动界面RM不稳定性以及多模扰动激波诱导平面界面RM不稳定性的精细流场结构及湍流混合过程实验研究。通过细针约束肥皂膜方式生成具有周期性的多模扰动界面以及利用多模扰动界面形成多模扰动激波，采用高速纹影技术及激光切片技术力求获得激波-界面相互作用过程中的波系发展和界面演化，以及流场速度场、涡量场等定量信息。通过本项研究，发展和优化具有周期性的多模扰动界面生成技术以及掌握激光切片技术在有膜界面中的应用；得到多模扰动界面在平面激波作用下的发展规律，掌握不同模态之间的耦合与竞争关系；掌握多模扰动激波的运动特性，得到多模扰动激波诱导下平面界面的演化规律，探讨与经典RM不稳定性的异同；此外发展先进的数值模拟和理论方法，揭示界面不稳定性产生和发展的内在机理。

The multi-mode Richtmyer-Meshkov (RM) instability plays a central role both in academic area, such as turbulent mixing formation, and in applications, such as inertial confinement fusion. The experimental investigation on the RM instability of a periodic multi-mode disturbed interface subjected to a planar shock wave, and the RM instability of a planar interface accelerated by a multi-mode disturbed shock wave in a shock tube is proposed in the project. Through the restriction of the thin needles, periodic multi-mode disturbed interfaces can be formed, and the multi-mode disturbed shock wave can be generated by a planar shock wave passing through a multi-mode disturbed interface. High-speed schlieren and continuous laser-sheet techniques are adopted to obtain the wave propagation and the interface movement during the shock-interface interaction, as well as the quantitative information of the flow field, such as the velocity and vorticity fields. Based on this investigation, a new interface formation method will be developed to generate periodic multi-mode disturbed interfaces, and the application of laser sheet technique to soap film interface will be established. Then the evolution of multi-mode disturbed interface after planar shock impact will be obtained and the mechanism of coupling and competition between different modes will be illustrated. The shock behavior after the planar shock passing through a multi-mode disturbed interface will be understood. Moreover, the development of a planar interface accelerated by a multi-mode disturbed shock wave is established, and the comparison between the classical RM instability will be made. Advanced numerical and analytical methods will further be developed to reveal the mechanism of the RM instability.