Journal of Fluid Mechanics

Experiments on the stability of supersonic laminar boundary layers

A. D.  Kosinov a1, A. A.  Maslov a1 and S. G.  Shevelkov a1
a1 Institute of Theoretical and Applied Mechanics, USSR, Academy of Sciences. Novosibirsk 630090, USSR

Article author query
kosinov ad   [Google Scholar] 
maslov aa   [Google Scholar] 
shevelkov sg   [Google Scholar] 


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.

(Published Online April 26 2006)
(Received June 29 1988)
(Revised April 4 1990)