Two-Dimensional Autowave Gas-Dynamic Structures in Isentropically Unstable Heat-Releasing Gas

被引：4

作者：

Ryashchikov, D. S. ^{[1
,2
]}

Molevich, N. E. ^{[1
,2
]}

Zavershinskii, D. I. ^{[1
]}

机构：

[1] Samara Natl Res Univ, Samara 443086, Russia

[2] Russian Acad Sci, Lebedev Phys Inst, Dept Theoret Phys, Samara Branch, Samara 443011, Russia

来源：

TECHNICAL PHYSICS LETTERS | 2018年 / 44卷 / 12期

基金：

俄罗斯基础研究基金会;

关键词：

WAVES; EVOLUTION;

D O I：

10.1134/S1063785018120532

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The evolution of gas-dynamic perturbations in a heat-releasing medium was investigated in two-dimensional geometry under conditions of isentropic instability. Decomposition of the initial perturbation of step type, possessing transversal modulation (ripples) of front, into a sequence of flat autowave fronts predicted by a generalized nonlinear acoustic equation is shown. Evolution of localized perturbation results in decomposition into sequence of concentric autowaves. The front of two-dimensional structures is resistant to transversal modulation. A quasi-regular cellular structure is formed behind the fronts.

引用

页码：1163 / 1166

页数：4

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