Inclination of an impinging jet on a moving wall to control the stagnation point location

The present work is devoted to the numerical study of the interaction of an inclined plane turbulent jet with a moving horizontal isothermal hot wall. The inclination of the jet allows the control of the stagnation point location. The numerical predictions based on statistical modeling are achieved using second order Reynolds stress turbulence model coupled to the enhanced wall treatment. For a given impinging distance H (H = 8e), the problem parameters are: (a) jet exit Reynolds number (Re, based on the thickness of the nozzle: e) ranged from 10,000 to 25,000, (b) surface-to-jet velocity ratio Rsj from left to right; range of 0-1.75 and (c) enhanced inclination angle of the jet between 0° and 25°. The calculations are in good agreement with the available data. The numerical results show that the heat transfer is greatly influenced by the velocities of the jet and the moving wall. The local Nusselt number decreases with increasing surface-to-jet velocity ratios (until Rsj = 1). However, the accurate inclination of the jet enhances heat transfer and recovers the stagnation point location. The distribution of average Nusselt number is correlated according with some problem parameters.