NUMERICAL COMPUTATION OF AN IMPINGING JET WITH UNIFORM WALL SUCTION

The paper presents numerical predictions of a turbulent axisymmetric j et impinging onto a porous plate, based on a finite volume method of s olving the Navier-Stokes equations for an incompressible air jet with the K-epsilon turbulence model. The velocity and pressure terms of the momentum equations are solved by the SIMPLE (semi-implicit method for pressure-linked equation) method. In this study, non-uniform staggere d grids are used. The parameters of interest include the nozzle-to-wal l distance and the suction velocity. The results of the present calcul ations are compared with available data reported in the literature. It is found that suction effects reduce the boundary layer thickness and increase the velocity gradient near the wall.