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TRAVELING AND STATIONARY WAVES IN A SUPERSONIC JET AND THEIR INTERACTION IN LINEAR AND NONLINEAR APPROXIMATIONS

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Abstract

This paper touches upon the influence of the curvature of a gas trajectory at the initial section of a supersonic nonisobaric jet on the features of nonstationary perturbations from the Kelvin–Helmholtz instability class. It is shown that, in the presence of a barrel-shaped structure, stationary Taylor–Görtler perturbations in the form of longitudinal structures (banded elements) arise. Studies for a mixing layer with a Mach number M = 1.5 are carried out. The possibility of amplifying and suppressing the growth of Kelvin–Helmholtz perturbations by stationary Taylor–Görtler waves is considered. A nonlinear problem is solved within the framework of three-wave resonance interactions in a local-parallel approximation. A pumping wave is a stationary Taylor–Görtler wave. It is shown that, at the initial section, small-amplitude traveling waves can be both amplified and suppressed.

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  1. Khristianovich Institute of Theoretical and Applied Mechanics, 630090, Novosibirsk, Russia

    N. M. Terekhova

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  1. N. M. Terekhova
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Correspondence to N. M. Terekhova.

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Terekhova, N.M. TRAVELING AND STATIONARY WAVES IN A SUPERSONIC JET AND THEIR INTERACTION IN LINEAR AND NONLINEAR APPROXIMATIONS. J Appl Mech Tech Phy 61, 740–747 (2020). https://doi.org/10.1134/S0021894420050077

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  • DOI: https://doi.org/10.1134/S0021894420050077

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