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
收藏
页码：1163 / 1166
页数：4
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