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Thermophysics and Aeromechanics

2003 year, number 2

Perturbations of compressible boundary layer caused by the roughness of plate surface

G.V. Petrov
Institute of Theoretical and Applied Mechanics SB RAS, Novosibirsk, Russia
Pages: 215-223


A linear problem for the perturbations of a compressible laminar boundary layer caused by a small sinusoidal roughness of the plate surface is formulated and solved with the use of parabolized equations of stability. The peculiarities of the disturbances behaviour are studied for the angles between the front of the roughness wave and flow direction, which are equal to the Mach angle. The parameters of sound emitted by the rough plate are calculated at a supersonic flow (M = 2).