Numerical Modeling of Acoustic Instability in a Nonequilibrium Vibrationally Excited Gas

被引：0

作者：

Khrapov, S. S. ^{[1
]}

Ivanchenko, G. S. ^{[1
]}

Radchenko, V. P. ^{[1
]}

Titov, A. V. ^{[1
]}

机构：

[1] Volgograd State Univ, Volgograd 400062, Russia

来源：

TECHNICAL PHYSICS | 2024年 / 69卷 / 06期

基金：

俄罗斯科学基金会;

关键词：

nonequilibrium gas; vibrational relaxation; acoustic instability; numerical modeling; CSPH-TVD method;

D O I：

10.1134/S1063784224060173

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Based on gas-dynamic methods, numerical modeling of the nonlinear dynamics of sound waves in a vibrationally excited nonequilibrium gas was carried out and the main stages of the evolution of acoustic instability were studied. It is shown that in numerical models the linear regime with an exponential growth law of the amplitude of disturbances is in good agreement with the linear analysis of stability, and at the nonlinear stage of development of acoustic instability, a system of shock waves is formed. The effects of nonlinear saturation of the intensity of shock waves, caused by the stabilization of acoustic instability, are demonstrated.

引用

页码：1596 / 1601

页数：6

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