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

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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

Author(s):
Hart, R. W. ; Cantrell, R. H.
Author Organization(s):
JOHNS HOPKINS UNIV SILVER SPRING MD APPLIED PHYSICS LAB
Annotation:
Acoustic radiation from pressure-antisymmetric modes of a centrally vented cylindrical cavity.
Pagination:
0022

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
TG-335-13
Contract/Grant Number(s):
NOw-62-0604-c
 Subject Terms
Joint Capability Areas:
JCA_3.2_Engagement; JCA_3_Force Application
Communities of Interest:
Weapons Technologies
Descriptor(s):
(*SOLID PROPELLANT ROCKET ENGINES, ACOUSTICS), (*COMBUSTION CHAMBERS, ACOUSTICS), CYLINDRICAL BODIES, OSCILLATION, STABILITY, ORIFICES, ANALYSIS OF VARIANCE, INTEGRALS, SOLID ROCKET PROPELLANTS
Field(s)/Group(s):
Acoustics, Combustion and Ignition, Solid Propellant Rocket Engines, Solid Rocket Propellants
Report Date:
1962 Aug 01