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

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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.

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Authors and Affiliations

  1. Samara National Research University, Samara, 443086, Russia

    D. S. Ryashchikov, N. E. Molevich & D. I. Zavershinskii

  2. Department of Theoretical Physics, Lebedev Physical Institute (Samara Branch), Russian Academy of Sciences, Samara, 443011, Russia

    D. S. Ryashchikov & N. E. Molevich

Authors
  1. D. S. Ryashchikov
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  2. N. E. Molevich
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  3. D. I. Zavershinskii
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Correspondence to D. S. Ryashchikov.

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Original Russian Text © D.S. Ryashchikov, N.E. Molevich, D.I. Zavershinskii, 2018, published in Pis’ma v Zhurnal Tekhnicheskoi Fiziki, 2018, Vol. 44, No. 24, pp. 94–102.

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Ryashchikov, D.S., Molevich, N.E. & Zavershinskii, D.I. Two-Dimensional Autowave Gas-Dynamic Structures in Isentropically Unstable Heat-Releasing Gas. Tech. Phys. Lett. 44, 1163–1166 (2018). https://doi.org/10.1134/S1063785018120532

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  • DOI: https://doi.org/10.1134/S1063785018120532

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