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TsAGI Science Journal

ISSN Druckformat: 1948-2590
ISSN Online: 1948-2604

TsAGI Science Journal

DOI: 10.1615/TsAGISciJ.2018029185
pages 723-731

NUMERICAL INVESTIGATION OF THE SECONDARY SEPARATION IN A SUBSONIC FLOW OVER A BACKWARD-FACING STEP

Tatiana Anatolyevna Pimenova
Central Aerohydrodynamic Institute (TsAGI), Zhukovsky str. 1, Zhukovsky, Moscow Region, 140180 Russia

ABSTRAKT

A numerical investigation of the internal structure of the separation zone based on the two-dimensional Navier–Stokes equations for subsonic turbulent flow over a backward-facing step has been carried out. The numerical estimation of the size of the secondary separation zone using two turbulence models has shown that with an increase in the Reynolds number, the secondary separation region behind the backward-facing step decreases. In order to prove the absence of three-dimensional (3D) effects in the flow, the problem has been also considered in 3D formulation.


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