Accession Number : AD0642124

Title :   EFFECTS OF CROSS-SECTIONAL AREA CHANGE ON THE SPEED OF A SHOCK WAVE,

Corporate Author : HEBREW UNIV JERUSALEM (ISRAEL) MICROWAVE DIV

Personal Author(s) : Dvir,M. ; Low,W. ; Maniv,S. ; Stricker,J.

Report Date : APR 1966

Pagination or Media Count : 43

Abstract : An experimental study of the effect of convergent and divergent nozzles with area changes of 4:1, 1:4 and 1:8 on the moderate shock speed is presented. The results are compared with the theoretical predictions of the linear and steady state theories. When the experimental values are corrected for viscous effects, it is found that near the exit of the nozzle the Mach speed approximates the values of the linear theory. Far downstream the Mach speed approaches to the steady state values. Superimposed on this gradual change are maxima and minima in the Mach speed. These fluctuations are functions of P4, P1, M and the angle of the taper section. These maxima and minima can be explained to arise from interference effects between the transmitted and re-reflected shock waves. (Author)

Descriptors :   (*SHOCK WAVES, VELOCITY), NOZZLE GAS FLOW, SHOCK TUBES, LINEAR SYSTEMS, TAPER, ONE DIMENSIONAL FLOW, ISRAEL

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE