Abstract

This paper presents the results of experimental and computational studies of instability development and mixing at the contact boundaries between gases of different densities. It has been shown that instability and mixing at two contact boundaries in a three-layer gas systems occur after a shock wave with a Mach number M = 1.3 that forms on the left end and moves along the tube has passed through the contact boundaries. Two experiments were performed, in the first of which the central layer was filled with a heavy gas (SF6 gas), and in the second experiment, it was filled with a light gas (helium). On the left and right of the central layer was air at atmospheric pressure. A comparison of the results was performed.

中文翻译：

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三层气系统中接触边界处不稳定发展的数值模拟：与实验数据的比较

摘要

本文介绍了在不同密度的气体之间的接触边界处的不稳定性发展和混合的实验和计算研究的结果。已经表明，在马赫数M = 1.3的冲击波在左端形成并沿着管子移动经过了接触边界之后，在三层气体系统中的两个接触边界处发生了不稳定性和混合。进行了两个实验，在第一个实验中，中央层充满了重气体（SF6气体），在第二个实验中，中央层中填充了轻气体（氦气）。中央层的左侧和右侧是处于大气压下的空气。比较结果。