Prediction of Combustion Induced Vibration in Rocket Motors

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.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1978
Accession Number
ADA053586

Entities

People

  • John C. Handley
  • Warren C. Strahle

Organizations

  • Georgia Tech

Tags

Communities of Interest

  • Air Platforms
  • Ground and Sea Platforms
  • Sensors
  • Weapons Technologies

DTIC Thesaurus Topics

  • Accuracy
  • Acoustic Properties
  • Acoustic Signals
  • Acoustics
  • Barometric Pressure
  • Burning Rate
  • Combustion
  • Convection
  • Differential Equations
  • Ignition
  • Mach Number
  • Measurement
  • Pipe Flow
  • Solid Propellants
  • Sound Pressure
  • Tape Recorders
  • Transducers

Fields of Study

  • Physics

Readers

  • Acoustics.
  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Rocket Propulsion.