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TsAGI Science Journal

ISSN Imprimer: 1948-2590
ISSN En ligne: 1948-2604

TsAGI Science Journal

DOI: 10.1615/TsAGISciJ.2014011008
pages 821-842

NUMERICAL INVESTIGATION OF VISCOUS GAS FLOW IN 3D SINGLE EXPANSION-RAMP NOZZLES

Anatoliy Pavlovich Mazurov
Central Aerohydrodynamic Institute (TsAGI), Zhukovsky str. 1, Zhukovsky, 140180, Russia

RÉSUMÉ

The results of a numerical investigation of three-dimensional (3D) viscous flow in asymmetrical plane nozzles (bounded by two parallel side walls) in the presence of an external supersonic flow are presented. The calculations were performed by an implicit difference scheme of integrating the Reynolds-averaged Navier−Stokes equations written in thin-layer approximation in generalized coordinates. A two-parameter κ − ε turbulence model, taking into account the influence of the wall, was used to calculate the eddy viscosity. The solution to the 3D system of difference equations is carried out using the Gauss−Seidel method of planes relaxation. A comparison of the pressure distributions calculated by the present method with appropriate experimental and computational data is carried out for an asymmetrical nozzle with a flat expansion ramp. A comparison of the two-dimensional and 3D computation results is given for the profiled contour nozzle. The parametric computation results that show the influence of the geometry parameters on the local and integral characteristics of the typical single expansion-ramp nozzle are presented.


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