Numerical and Experimental Study of Perpendicular Impinging of Rectangular Air jet onto a Flat Plate

In this study, an experimental and numerical analysis based on computational fluid dynamics is done to study the flow characteristics of a turbulent compressible jet impingement on a flat plate. The purpose is to investigate the behavior of cutting gas jets. In numerical model a finite volume approach with realizable k-ε model is used. Pressure and shear stress distribution over the flat plate are determined for various distances between nozzle and plate. Comparisons between numerical results and experimental measurements validate the accuracy of numerical results. Obtained results show that if the horizontal distance between the nozzle outlet and flat plate is 7.84 times of characteristic length of jet, the shear stress on the flat plate has maximum value. Therefore, in this case jet has a maximum performance in cutting procedure.