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TsAGI Science Journal

ISSN Print: 1948-2590
ISSN Online: 1948-2604

TsAGI Science Journal

DOI: 10.1615/TsAGISciJ.2018027466
pages 415-427

TO THE THEORY OF UNSTEADY SEPARATION AND INTERACTION OF BOUNDARY LAYER WITH SUPERSONIC GAS FLOW

Igor Ivanovich Lipatov
Central Aerohydrodynamic Institute (TsAGI) 1, Zhukovsky str., Zhukovsky, 140180, Moscow region, Russia
Vladimir Yakovlevich Neiland
Central Aerohydrodynamic Institute (TsAGI), 1 Zhukovsky Str., Zhukovsky 140180, Russia

ABSTRACT

The effect of unsteady perturbations caused by the oscillation of the aerodynamic control surface (flap) or by the base pressure pulsations on the flow in the laminar boundary layer is analyzed. The flow regimes are classified depending on the frequency and amplitude of oscillations (pulsations) and Reynolds number. The asymptotic relation between parameters that distinguishes separated and attached flow regimes is derived. Analytical and numerical solutions of several boundary value problems that describe unsteady interaction between the flow in the laminar boundary layer and the external supersonic flow are obtained.


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