Accession Number : AD0626723
Title : ON ACOUSTIC DAMPING IN CAVITIES WITH MEAN VELOCITY AND THERMAL BOUNDARY LAYERS.
Corporate Author : JOHNS HOPKINS UNIV SILVER SPRING MD APPLIED PHYSICS LAB
Personal Author(s) : Cantrell,R. H. ; McClure,F. T. ; Hart,R. W.
Report Date : DEC 1962
Pagination or Media Count : 40
Abstract : Viscous and thermal losses of acoustic energy at a metal wall are calculated for the condition in which there is a low Mach number flow sustaining a temperature difference between the gas and the wall. The acoustic loss is found to decrease as the walls are cooled below the temperature of the main body of the gas. The results of the study are relevant to experiments on acoustic amplification by solid rocket propellants and to at least some cases of liquid propellant rocket acoustic instability. (Author)
Descriptors : (*SOLID PROPELLANT ROCKET ENGINES, ACOUSTICS), (*LIQUID PROPELLANT ROCKET ENGINES, ACOUSTICS), COMBUSTION CHAMBERS, OSCILLATION, DAMPING, FLUID FLOW, COOLING, BOUNDARY LAYER, THERMODYNAMICS
Subject Categories : Acoustics
Combustion and Ignition
Liquid Propellant Rocket Engines
Solid Propellant Rocket Engines
Distribution Statement : APPROVED FOR PUBLIC RELEASE