Abstract

For the conditions obtained in experiments on the interaction between a shock wave and the ionization-unstable plasma, the influence of a thermally stratified energy source on the front of a shock wave is numerically modeled on the basis of the full system of Navier–Stokes equations. It is shown that the front curvature detected in schlieren images is associated with a higher temperature of central layers in the source, while its disappearance is due to the multiple generation of Richtmyer–Meshkov instabilities in the gas density field. It is demonstrated that the redistribution of source energy into layers leads to the formation of local areas with a gas temperature increased by several times (in comparison with the values for a homogeneous source) behind a shock wave.

中文翻译：

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分层能量影响下冲击波后的密度和温度波动

摘要

对于在冲击波和不稳定电离等离子体之间相互作用的实验条件下，在整个Navier–Stokes方程组的基础上，对热分层能量源对冲击波前部的影响进行了数值模拟。 。结果表明，在裂纹岩图像中检测到的前部曲率与源中中心层的较高温度有关，而其消失则是由于气体密度场中发生了里希特米尔-梅什科夫不稳定性的多重产生。事实证明，将源能量重新分配到层中会导致局部区域的形成，其中气体温度在冲击波之后增加了几倍（与均匀源的值相比）。