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Prikladnaya Mekhanika i Tekhnicheskaya Fizika, 2008, Volume 49, Issue 2, Pages 3–14
(Mi pmtf1877)
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This article is cited in 14 scientific papers (total in 14 papers)
Linear stability of three-dimensional boundary layers
S. A. Gaponov, B. V. Smorodskii Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Division, Russian Academy of Sciences, Novosibirsk, 630090
Abstract:
Stability of compressible three-dimensional boundary layers on a swept wing model is studied within the framework of the linear theory. The analysis based on the approximation of local self-similarity of the mean flow was performed within the Falkner–Skan–Cooke solution extended to compressible flows. The calculated characteristics of stability for a subsonic boundary layer are found to agree well with the measured results. In the case of a supersonic boundary layer, the results calculated for a Mach number $\mathrm{M}$ = 2 are also in good agreement with the measured spanwise scales of nonstationary vortices of the secondary flow. The calculated growth rates of disturbances, however, are substantially different from the measured values. This difference can be attributed to a high initial amplitude of disturbances generated in the experiment, which does not allow the linear stability theory to be applied. The evolution of natural disturbances with moderate amplitudes is fairly well predicted by the theory. The effect of compressibility on crossflow instability modes is demonstrated to be insignificant.
Keywords:
three-dimensional boundary layer, hydrodynamic stability, laminar-turbulent transition.
Received: 21.05.2007
Citation:
S. A. Gaponov, B. V. Smorodskii, “Linear stability of three-dimensional boundary layers”, Prikl. Mekh. Tekh. Fiz., 49:2 (2008), 3–14; J. Appl. Mech. Tech. Phys., 49:2 (2008), 157–166
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https://www.mathnet.ru/eng/pmtf1877 https://www.mathnet.ru/eng/pmtf/v49/i2/p3
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