Accession Number:

ADA053586

Title:

Prediction of Combustion Induced Vibration in Rocket Motors

Descriptive Note:

Final rept. 1 Mar 1977-28 Feb 1978

Corporate Author:

GEORGIA INST OF TECH ATLANTA SCHOOL OF AEROSPACE ENGINEERING

Personal Author(s):

Report Date:

1978-04-01

Pagination or Media Count:

122.0

Abstract:

The source of solid rocket motor vibration is investigated by treating the problem of pressure fluctuations inside the motor cavity. Theoretical aeroacoustics is applied to the cavity gases and imbedded burning metal agglomerates. Several critical experiments are performed to provide numerical input to the theory. Consideration of turbulence, combustion and entropy noise yields the conclusion that only one cause is dominant for the fluctuations in chamber pressure - that of interaction of turbulence with the exhaust nozzle. Typically, an 0.4 rms pressure fluctuation can be accounted for by this mechanism. Spectral distributions of the noise are presented and a comparison is made of the theory and an actual motor firing.

Subject Categories:

  • Numerical Mathematics
  • Mechanics
  • Combustion and Ignition
  • Solid Propellant Rocket Engines
  • Solid Rocket Propellants

Distribution Statement:

APPROVED FOR PUBLIC RELEASE