Instability and Noise Generation in Air-Breathing Propulsion Systems.
Interim progress rept. 1 Jun 71-31 May 72,
ULTRASYSTEMS INC IRVINE CALIF
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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
- Combustion and Ignition
- Jet and Gas Turbine Engines