Accession Number : AD0626718

Title :   ACOUSTIC RADIATION FROM PRESSURE-ANTISYMMETRIC MODES OF A CENTRALLY VENTED CYLINDRICAL CAVITY.

Corporate Author : JOHNS HOPKINS UNIV SILVER SPRING MD APPLIED PHYSICS LAB

Personal Author(s) : Hart,R. W. ; Cantrell,R. H.

Report Date : AUG 1962

Pagination or Media Count : 22

Abstract : The losses associated with the pressure-antisymmetric modes of centrally vented cylindrical cavities are of special interest because of their relevance to acoustic instability of rocket motors. Because the pressure amplitude of such an unperturbed mode is highly nonuniform over the orifice, the usual lumped circuit calculation is invalid. If it is used in spite of this, one finds no radiation out of the orifice. A variational analysis was carried out to obtain a quantitative estimate of the loss which should actually occur. (Author)

Descriptors :   (*SOLID PROPELLANT ROCKET ENGINES, ACOUSTICS), (*COMBUSTION CHAMBERS, ACOUSTICS), CYLINDRICAL BODIES, OSCILLATION, STABILITY, ORIFICES, ANALYSIS OF VARIANCE, INTEGRALS, SOLID ROCKET PROPELLANTS

Subject Categories : Acoustics
      Combustion and Ignition
      Solid Propellant Rocket Engines
      Solid Rocket Propellants

Distribution Statement : APPROVED FOR PUBLIC RELEASE