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Thermophysics and Aeromechanics

2016 year, number 1

Impact of incident Mach wave on supersonic boundary layer

A.V. Vaganov1, Yu.G. Ermolaev2, G.L. Kolosov2, A.D. Kosinov2, 3, A.V.В Panina2, N.V. Semionov2, and В A.A. Yatskikh2,3

1Central Aerohydrodynamic Institute, Zhukovskii, Moscow Region, Russia

2Khristianovich Institute of Theoretical and Applied Mechanics SB RAS, В Novosibirsk, Russia

3Novosibirsk State University, Novosibirsk, Russia

E-mail: kosinov@itam.nsc.ru
Keywords: supersonic velocities, experimental studies, wind tunnel, flat plate, sharp and blunt leading edges, boundary layer, hot-wire anemometry
Pages: 43–48

Abstract

Results of an experimental study of the excitation of high-intensity disturbances by a weak external shock wave in laminar boundary layer on flat-plate models with sharp and blunted leading edges at М = 2.5 are reported. The field of disturbances produced by a 2D sticker in turbulent boundary layer on the wall of wind-tunnel test section in the free stream is shown to have the form of an N-wave. It is found that, on the blunted plate, the intensity of pulsations produced by weak external shock waves in boundary layer several times exceeds the intensity of pulsations produced in boundary layer on the model with a sharp leading edge.

DOI: 10.1134/S0869864316010054