Turbulent Jet Over an Inclined Wall

Abstract

The flow in a turbulent wall jet, with a control port and setback between the nozzle exit and the leading edge of the wall, was probed at various stations along the jet for Reynolds numbers (based on the nozzle width) ranging from 20,000 to 140,000. The similarity or the dissimilarity of the velocity profiles (for all Reynolds numbers) in the outer and inner regions of the jet and the pressure distribution along the wall were investigated. A new integral equation was used in the interpretation of the results and in the determination of the limitations of the range of applicability of Glauert’s wall-jet analysis. It was found that, whereas the similarity law holds true for the outer layer of the jet (beyond the entrance region), there is no similarity between the velocity profiles either in the inner layer or in the entrance region and that the pressure along the wall is slightly higher than that of the surrounding fluid which is at rest.