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

Volume 49, Issue 4, 2018, pp. 415-427
DOI: 10.1615/TsAGISciJ.2018027466
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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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