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TsAGI Science Journal

ISSN Imprimir: 1948-2590
ISSN En Línea: 1948-2604

TsAGI Science Journal

DOI: 10.1615/TsAGISciJ.v41.i3.30
pages 269-284

NUMERICAL SIMULATION OF THE EFFECT OF ACOUSTICWAVE INCLINATION ANGLE ON A HYPERSONIC BOUNDARY-LAYER RECEPTIVITY

Vitaly Georgievich Soudakov
Central Aerohydrodynamic Institute (TsAGI), Zhukovsky, Moscow region, Russia

SINOPSIS

Receptivity of a hypersonic boundary layer (free-stream Mach number M = 6) is investigated in terms of numerical simulation of Navier-Stokes equations (direct numerical simulation) for twodimensional unsteady flows over a flat plate with a sharp leading edge. Physical mechanisms of the receptivity to two-dimensional monochromatic slow and fast acoustic waves within a wide range of inclination angles to the plate surface are considered. The shock wave, which is formed near the leading edge, produces a profound effect on the acoustic near-field and the receptivity process due to the viscous-inviscid interaction. Interaction of several factors (acoustic field, interference of acoustic waves with a shock wave, penetration of acoustic waves into the boundary layer, synchronization of acoustic waves with an unstable mode in the boundary layer) leads to a non-monotonic dependency of the receptivity level on the inclination angle of the acoustic wave at given parameters of the boundary layer.


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