Two-Dimensional Autowave Gas-Dynamic Structures in Isentropically Unstable Heat-Releasing Gas
- Authors: Ryashchikov D.S.1,2, Molevich N.E.1,2, Zavershinskii D.I.1
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Affiliations:
- Samara National Research University
- Department of Theoretical Physics, Lebedev Physical Institute (Samara Branch)
- Issue: Vol 44, No 12 (2018)
- Pages: 1163-1166
- Section: Article
- URL: https://journals.rcsi.science/1063-7850/article/view/208153
- DOI: https://doi.org/10.1134/S1063785018120532
- ID: 208153
Cite item
Abstract
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.
About the authors
D. S. Ryashchikov
Samara National Research University; Department of Theoretical Physics, Lebedev Physical Institute (Samara Branch)
Author for correspondence.
Email: ryashchikovd@gmail.com
Russian Federation, Samara, 443086; Samara, 443011
N. E. Molevich
Samara National Research University; Department of Theoretical Physics, Lebedev Physical Institute (Samara Branch)
Email: ryashchikovd@gmail.com
Russian Federation, Samara, 443086; Samara, 443011
D. I. Zavershinskii
Samara National Research University
Email: ryashchikovd@gmail.com
Russian Federation, Samara, 443086