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Experiments on the stability of supersonic laminar boundary layers

Published online by Cambridge University Press:  26 April 2006

A. D. Kosinov ,
A. A. Maslov  and
S. G. Shevelkov
A. D. Kosinov
Affiliation:
Institute of Theoretical and Applied Mechanics, USSR, Academy of Sciences. Novosibirsk 630090, USSR
A. A. Maslov
Affiliation:
Institute of Theoretical and Applied Mechanics, USSR, Academy of Sciences. Novosibirsk 630090, USSR
S. G. Shevelkov
Affiliation:
Institute of Theoretical and Applied Mechanics, USSR, Academy of Sciences. Novosibirsk 630090, USSR
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Abstract

The present paper reports an experimental study of the development of plane monochromatic waves in the boundary layer on a flat plate at Mach number M = 2.0. The wave characteristics of the plane waves are obtained. Three-dimensional disturbances with an angle of the wave vector to the flow χ = 50–70° are found to be the most unstable. It is shown that the disturbances, consisting of vortical and compressible modes, are engendered in a supersonic boundary layer by a local source of artificial disturbances. It is found that an increase in the bluntness of the leading edge of a plate stabilizes three-dimensional disturbances of a vortical mode.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 219 , October 1990 , pp. 621 - 633
Copyright
© 1990 Cambridge University Press

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