ON ACOUSTIC DAMPING IN CAVITIES WITH MEAN VELOCITY AND THERMAL BOUNDARY LAYERS.

Abstract

Viscous and thermal losses of acoustic energy at a metal wall are calculated for the condition in which there is a low Mach number flow sustaining a temperature difference between the gas and the wall. The acoustic loss is found to decrease as the walls are cooled below the temperature of the main body of the gas. The results of the study are relevant to experiments on acoustic amplification by solid rocket propellants and to at least some cases of liquid propellant rocket acoustic instability. (Author)

Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1962
Accession Number
AD0626723

Entities

People

  • F. T. Mcclure
  • R. H. Cantrell
  • R. W. Hart

Organizations

  • Johns Hopkins University Applied Physics Laboratory

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Amplification
  • Boundaries
  • Boundary Layer
  • Energetic Materials
  • Instability
  • Layers
  • Liquid Propellants
  • Mach Number
  • Materials
  • Motion
  • Propellants
  • Rocket Propellants
  • Solid Rocket Propellants
  • Thermal Boundary Layer

Fields of Study

  • Physics

Readers

  • Acoustics.
  • Fluid Mechanics and Fluid Dynamics.
  • Thermal Physics or Thermal Science.