Instability and Noise Generation in Air-Breathing Propulsion Systems.

Abstract

The report presents the progress of research accomplished on instability and noise generation in airbreathing propulsion systems during the period 1 Jun 1971 to 31 May 1972. During this period the focus has been on the theoretical delineation of various possible afterburner instability mechanisms. A literature review was made of other investigations of mechanisms whereby energy is pumped from the combustion process into a standing or traveling wave system within the combustor cavity. A theoretical analysis was initiated based on a periodic vortex shedding model. It is hypothesized in this model that vorticity is shed in an oscillatory manner from the flame holder at a frequency consistent with the cavity resonance. (Author Modified Abstract)

Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1973
Accession Number
AD0758890

Entities

People

  • J. J. Tyson

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Air Breathing
  • Combustion
  • Combustors
  • Demographic Cohorts
  • Flame Holders
  • Frequency
  • Ignition
  • Ignition Lag
  • Instability
  • Literature Surveys
  • Propulsion Systems
  • Thermal Propulsion Systems
  • Traveling Waves
  • Vortex Shedding

Fields of Study

  • Physics

Readers

  • Fluid Mechanics and Fluid Dynamics.
  • Internal Combustion Engine (ICE) Technology.
  • Optical Physics and Photonics.