Gas Interaction and Liquid Phase Reactions Associated with Swirl Combustion and Combustion Instability
Abstract
Three fundamental problems related to the combustion efficiency and smoother burning of an airbreathing propulsion system are studied. The first problem deals with the coupling of evaporation/decomposition of a liquid fuel and a novel technique of handling a slurry fuel. It has been found that at higher pressures liquid phase decomposition of a fuel is one of the primary sources of particulate formation and combustion inefficiency of an airbreathing combustor. Preliminary experiments and analyses of droplet shattering of a slurry fuel by pulsed low energy irradiation at selected frequencies show that this novel method of droplet break up might enable one to use slurry fuels without the usual problem of particle clustering. The second phase of the research dealing with vortex combustion and thee use of gas jets in the role of vortex amplifier and swirl generator identifies fundamental methods of increasing combustion efficiency, promoting smoother burning and decreasing the characteristics length of a burner. Finally the study of the coupling between the inlet pressure oscillation and combustion instability has identified the role of frequency, amplitude, wave-form and phase angle leading to pressure magnification in the burner. Through vortex control and a feedback system it may be possible to eliminate combustion instability.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1982
- Accession Number
- ADA121714
Entities
People
- Melvin Gerstein
- P. Roy Choudhury
Organizations
- University of Southern California