Accession Number : AD0711314

Title :   THE EFFECT OF NOZZLE GEOMETRY ON THE TOTAL PRESSURE DISTRIBUTION IN WALL JETS ON A CIRCULAR ATTACHMENT WALL AND ON JET-WALL EDGE INTERACTION.

Descriptive Note : Technical rept.,

Corporate Author : LEHIGH UNIV BETHLEHEM PA DEPT OF MECHANICAL ENGINEERING AND MECHANICS

Personal Author(s) : Owczarek,Jerzy A. ; Rockwell,Donald O. ; Cha,Y-S.

Report Date : JUN 1970

Pagination or Media Count : 67

Abstract : 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)

Descriptors :   (*NOZZLE GAS FLOW, PRESSURE), (*FLUID AMPLIFIERS, JETS), GEOMETRY, DISTRIBUTION, WALLS, INTERACTIONS

Subject Categories : Aerodynamics
      Fluidics and Fluerics

Distribution Statement : APPROVED FOR PUBLIC RELEASE