非平衡振动激发气体中的声不稳定性数值建模

IF 1.1 4区物理与天体物理 Q4 PHYSICS, APPLIED

Technical Physics Pub Date : 2024-09-26 DOI:10.1134/S1063784224060173

S. S. Khrapov, G. S. Ivanchenko, V. P. Radchenko, A. V. Titov

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引用次数: 0

摘要

基于气体动力学方法，对振动激发非平衡气体中声波的非线性动力学进行了数值建模，并研究了声学不稳定性演变的主要阶段。结果表明，在数值模型中，扰动振幅呈指数增长规律的线性机制与稳定性的线性分析十分吻合，而在声学不稳定性的非线性发展阶段，则形成了冲击波系统。证明了声学不稳定性的稳定所引起的冲击波强度非线性饱和的影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Numerical Modeling of Acoustic Instability in a Nonequilibrium Vibrationally Excited Gas

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Numerical Modeling of Acoustic Instability in a Nonequilibrium Vibrationally Excited Gas

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.

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来源期刊

Technical Physics 物理-物理：应用

CiteScore

1.30

自引率

14.30%

发文量

139

审稿时长

3-6 weeks

期刊介绍： Technical Physics is a journal that contains practical information on all aspects of applied physics, especially instrumentation and measurement techniques. Particular emphasis is put on plasma physics and related fields such as studies of charged particles in electromagnetic fields, synchrotron radiation, electron and ion beams, gas lasers and discharges. Other journal topics are the properties of condensed matter, including semiconductors, superconductors, gases, liquids, and different materials.