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 Zh. Vychisl. Mat. Mat. Fiz., 2018, Volume 58, Number 3, Pages 431–446 (Mi zvmmf10694)

Asymptotic approach to the problem of boundary layer instability in transonic flow

V. I. Zhuk

Dorodnicyn Computing Center, Federal Research Center “Computer Science and Control”, Russian Academy of Sciences, Moscow, Russia

Abstract: Tollmien–Schlichting waves can be analyzed using the Prandtl equations involving selfinduced pressure. This circumstance was used as a starting point to examine the properties of the dispersion relation and the eigenmode spectrum, which includes modes with amplitudes increasing with time. The fact that the asymptotic equations for a nonclassical boundary layer (near the lower branch of the neutral curve) have unstable fluctuation solutions is well known in the case of subsonic and transonic flows. At the same time, similar solutions for supersonic external flows do not contain unstable modes. The bifurcation pattern of the behavior of dispersion curves in complex domains gives a mathematical explanation of the sharp change in the stability properties occurring in the transonic range.

Key words: free interaction, boundary layer, transonic and subsonic flow, stability, dispersion relation, Airy function, Tollmien–Schlichting wave, spectrum of eigenmodes, increment of growth, phase velocity, wave number, neutral curve.

DOI: https://doi.org/10.7868/S0044466918030109

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English version:
Computational Mathematics and Mathematical Physics, 2018, 58:3, 410–424

Bibliographic databases:

UDC: 519.635

Citation: V. I. Zhuk, “Asymptotic approach to the problem of boundary layer instability in transonic flow”, Zh. Vychisl. Mat. Mat. Fiz., 58:3 (2018), 431–446; Comput. Math. Math. Phys., 58:3 (2018), 410–424

Citation in format AMSBIB
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