ACOUSTIC INSTABILITY IN COMBUSTION

Abstract

Acoustic instability in solid propellant rockets is observed as a high-amplitude oscillation in the acoustic modes of the gas cavity, the combustion processes providing the driving energy. In general, the solid phase, i.e., the propellant, participates in the wave behavior. In this work, the behavior of both the gas phase and the solid phase were experimentally studied in a side-vented end burner. When the burner was operated with a grain in only one end, a difference in acoustic pressure amplitudes not previously reported was observed. The phenomenon was confirmed and studied in some detail. It does not affect the data used to calculate acoustic admittance values.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1966
Accession Number
AD0637160

Entities

People

  • Carl L. Oberg

Organizations

  • University of Utah

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Acoustic Admittance
  • Acoustic Phenomena
  • Acoustic Properties
  • Acoustic Velocity
  • Acoustics
  • Boundary Layer
  • Burning Rate
  • Chemical Reactions
  • Differential Equations
  • Heat Transfer
  • Mach Number
  • Mechanical Properties
  • Phase Studies
  • Physics Laboratories
  • Pressure Distribution
  • Pressure Measurement
  • Temperature Gradients

Fields of Study

  • Physics

Readers

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