This article is cited in 6 papers

Effect of heat supply to a narrow band of the boundary layer on its stability

S. A. Gaponov

Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch of the Russian Academy of Sciences, 630090, Novosibirsk, Russia

Abstract: Stability of a subsonic boundary layer with heat supply into its narrow band is studied. The maximum length of the stable boundary layer in the case of heat supply is found to be approximately three times smaller as compared to the case of a thermally insulated wall without heat supply. The frequency range of disturbances and their growth rates are approximately doubled. In contrast to the case without heat supply, three-dimensional disturbances are the most rapidly growing disturbances. In the case of a heated wall, the growth rate of disturbances decreases after heat supply into the boundary layer, which may lead to an increase in the length of the laminar region of the boundary layer.

Keywords: boundary layer, stability, heat supply, flame, self-similar, disturbances.

UDC: 532.526

Received: 18.05.2020
Revised: 18.05.2020
Accepted: 25.05.2020

DOI: 10.15372/PMTF20200501

 English version: Journal of Applied Mechanics and Technical Physics, 2020, 61:5, 685–692

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