Numerical study of transversal flow around a row of plates on the screen

Abstract

The possibility of the application of the Reynolds averaged Navier-Stokes equations for the description of the asymmetrical flow regimes around the row of plates on the screen is studied. Models are used turbulence models k - ω and Shear stress transport (SST). Two-dimensional calculation methods predict the existence of two asymmetric flow regimes around the array of plates, for sufficiently dense array. However, the boundary array density separated the symmetric and asymmetric flow regimes for different turbulence models are different. Three-dimensional calculations of the flow around four plates mounted on the screen showed that the parameter determining the flow regime (symmetrical or asymmetrical) is an effective density, introduced earlier by the results of experimental studies. Size and shape of the recirculation regions are determined using the model of turbulence k - ω. They are close to the size and shape of the recirculation regions observed in the wind tunnel experiment. Another model of turbulence SST does not predict the asymmetrical flow. Calculations demonstrated that for great height to width ratio unsteady flow regime exists. The regime is characterized by periodic oscillation of the forces acting on the plates.

Keywords:

numerical study, bluff bodies, recirculation region, aerodynamic coefficient