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俄罗斯空气动力研究所中心学报

ISSN 打印: 1948-2590
ISSN 在线: 1948-2604

俄罗斯空气动力研究所中心学报

DOI: 10.1615/TsAGISciJ.2018029524
pages 683-700

MARGINAL SEPARATION INTO REVERSE-FLOW REGION

Victor Vladimirovich Sychev
Central Aerohydrodynamic Institute, 1, Zhukvsky Str., Zhukovsky, 140180, Moscow Region, Russia

ABSTRACT

Two-dimensional steady flow of incompressible fluid around a thin body at high Reynolds number (Re → ∞) is considered. It is shown by the method of matched asymptotic expansions that in a separated flow region an interaction of the boundary layer and outer reverse flow appears at a certain body thickness. This occurs in a small—of the order Re-1/12—vicinity of zero surface friction point. The problem for the interaction region reduces to the known nonlinear integro-differential equation, and its solution describes the secondary separation flow with closed streamlines.