Spatial Effects of Interaction of a Shock with a Lateral Low-Density Gas Channel |
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Authors: | P. Yu. Georgievskiy V. A. Levin O. G. Sutyrin |
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Affiliation: | 1.Institute of Mechanics of Lomonosov Moscow State University,Moscow,Russia |
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Abstract: | Three-dimensional interaction of a shock with lateral low-density gas channel of round, elliptic or rectangular cross-section is numerically studied using Euler’s equations. The structure of formed shock wave precursor is described in detail. Internal shear layer instabilities in three-dimensional flow are shown to develop faster than in axisymmetric case. Moderate amplification of high-pressure jet cumulation effect is noted for elliptic and rectangular channel cases. Dependence of precursor growth rate on cross-section shape is studied. It is found that stretching of cross-section shape significantly increases the duration of linear precursor growth phase. |
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