A new experimental and methodological approach dedicated to the analysis of the development of a turbulent mixing zone produced by the Richtmyer-Meshkov instability is proposed. It relies on an innovative experimental device for the generation of well-defined initial gaseous interfaces in a multi-parametric and controlled way. This device ensures high repeatability and allows to shape the initial condition following various patterns, from monotonous to non monotonous ones. An overview of the main results obtained by means of strioscopic, Particle Image Velocimetry and tomoscopic measurements are provided. They unravel the fast transition of the mixing zone to a fully turbulent state, for a given set of control parameters of the device, as the imprint of the initial condition is lost and the dynamical spectral content covers a wide range of scales, compatible with the achievement of a self-similar trend.

中文翻译：

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Richtmyer-Meshkov不稳定性引起的气体混合区的湍流过渡

提出了一种新的实验和方法学方法，专用于分析由Richtmyer-Meshkov不稳定性产生的湍流混合区。它依靠创新的实验设备以多参数和受控方式生成定义明确的初始气态界面。该设备确保了高重复性，并允许按照从单调到非单调的各种模式来塑造初始状态。概述了通过频闪，粒子图像测速和断层测量获得的主要结果。对于设备的一组给定控制参数，由于初始条件的影响消失了，并且动态光谱含量涵盖了广泛的范围，因此，他们解开了混合区到完全湍流状态的快速过渡。