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摘要: 界面不稳定性, 特别是Richtmyer–Meshkov (RM) 不稳定性, 是流体力学中一项重要的研究内容, 无论在学术研究领域还是工程应用领域都有着重要的研究价值和应用背景. RM 不稳定性问题自提出以来, 得到了学术界广泛的关注, 其研究无论是在实验方法、数值模拟还是在理论分析方面都取得了很大的进展. 在激波管中开展激波与界面相互作用的实验研究, 即研究界面初始扰动在激波诱导下的演化规律, 是目前研究RM 不稳定性的重要手段. RM 不稳定性实验研究包括3 个部分, 分别是激波的产生、界面的形成以及流场的观测. 综述了RM 不稳定性的实验研究进展, 并针对目前研究的局限性提出了RM 不稳定性今后实验研究的重点和方向: 汇聚激波作用下界面不稳定性的发展规律; 激波冲击下多种形状及大振幅界面的演化机理; 三维界面的RM 不稳定性发展规律; 可压缩湍流的形成与混合机理.Abstract: Interfacial instability, especially the Richtmyer-Meshkov (RM) instability, isa significant topic in fluid mechanics because of its academic implication and engineeringapplications. Much attention has been paid to RM instability since it was proposed. Greatprogresses have been made through experimental, numerical and theoretical investigations.Currently, it is an important tool for the study of RM instability to perform the experimentof a shock wave interacting with a fluid interface in the shock tube. The generation of ashock wave, the formation of an initial interface and the diagnostic of the flow field are thethree elements that must be considered in the experimental study of RM instability. Thisreview article surveys the advances in experimental investigations of RM instability, andproposes the following issues for future study: (1) evolution of the RM instability inducedby cylindrical converging shock waves; (2) developments of the polygonal interface and theinitial perturbation with large amplitudes accelerated by shock waves; (3) the effect of thethree space dimensions on the RM instability; and (4) the formation and mixing mechanismof the compressible turbulence.
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Key words:
- Richtmyer–Meshkov instability /
- shock wave /
- interface /
- flow diagnostic
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