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Thermophysics and Aeromechanics

2016 year, number 5

Effect of the surface roughness of blunt cone forebody on the position of laminar-turbulent transition

D.A. Bountin, Yu.V. Gromyko, A.A. Maslov, P.A. Polivanov, and A.A. Sidorenko
Khristianovich Institute of Theoretical and Applied Mechanics SB RAS, Novosibirsk, Russia
E-mail: bountin@itam.nsc.ru
Keywords: hypersonic boundary layer, laminar-turbulent transition, surface roughness
Pages: 629–638

Abstract

In the present paper, data on the effect of the surface roughness of blunt cone forebody on the position of laminar-turbulent transition are reported. The study was carried out under freestream Mach 5.95. It was found that the roughness position plays a substantial role in the transition process. Critical Reynolds numbers at which the laminar-turbulent transition occurs on the nose-tip of the model were identified. For the first time, hysteresis in transition position was observed.

DOI: 10.1134/S0869864316050012