THE EFFECT OF NOZZLE GEOMETRY ON THE TOTAL PRESSURE DISTRIBUTION IN WALL JETS ON A CIRCULAR ATTACHMENT WALL AND ON JET-WALL EDGE INTERACTION.
LEHIGH UNIV BETHLEHEM PA DEPT OF MECHANICAL ENGINEERING AND MECHANICS
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The report deals with an experimental investigation of the effect of flow nonuniformities existing at the exit of certain planar nozzles on the total pressure distribution in a low-Mach-number wall jet on a circular attachment wall. In addition, a short study of the effects of internal edge-generated and external acoustic noise on the total pressure distribution in the wall jet is described. Most tests were run at the Reynolds number, based on the width of the nozzle at the exit and on the average flow speed at the nozzle exit, of 12,400. The tests have shown that the flow nonuniformities existing at the exit of the planar nozzles used have a large effect on the total pressure distribution in the wall jet. In addition, it was found that the internal acoustic noise can produce marked changes in the jet total pressure distribution, especially in the outer layer of the jet. The externally-applied acoustic noise produced similar effects. Author
- Fluidics and Fluerics