Comparative analysis of flow structure in an axisymmetric vortex chamber using the URANS approach and direct numerical simulation
N.P. Skibina, V.V. Terekhov, V.I. Terekhov
Kutateladze Institute of Thermophysics SB RAS, Novosibirsk, Russia
Keywords: numerical simulation, swirling flow, vortex chamber, Navier-Stokes equations
Abstract
A numerical study of the flow in a tangential vortex chamber using unsteady full and Reynolds-averaged Navier-Stokes equations is presented. The spatial flow of a viscous incompressible gas (air) is considered at Reynolds number Re = 3.4·104. The distributions of the axial and circumferential velocity components, as well as their pulsations, are analyzed. It is established that the solution of the full Navier-Stokes equations provides distribution of parameters in a swirling flow close to the results of experimental measurements, whereas turbulence models based on the Boussinesq hypothesis do not allow numerically reproduction of the dynamics of a confined swirling flow.
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