Published March 1986
| Published
Journal Article
Open
Longitudinal Combustion Instabilities in Ramjet Engines: Identification of Acoustic Modes
Abstract
Longitudinal combustion instabilities in liquid-fueled ramjet engines have been investigated with attention focused on determination of the acoustic mode structures. Detailed pressure measurements, including both amplitude and phase, were made at ten positions spanning the length of the engine. The experimental data have been analyzed using two linear acoustic models. Four distinct modes were observed for various inlet/combustor combinations. These results help identify the mechanisms exciting low-frequency pressure oscillations in ramjet engines.
Additional Information
© 1986 AIAA. Received April 4, 1985; revision received Oct. 14, 1985. The work at the Naval Weapons Center was performed under Air Task A3 103 100, Element 61153N and Independent Research Funding 2R000-01-01, Element 61152N; the work at the California Institute of Technology was supported by the Air Force Office of Scientific Research, Grant AFOSR-80-0265. This paper is declared a work of the U.S. Government and therefore is in the public domain.Attached Files
Published - 292_Crump_JE_1986.pdf
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Additional details
- Eprint ID
- 21085
- Resolver ID
- CaltechAUTHORS:20101201-085332901
- AFOSR-80-0265
- Air Force Office of Scientific Research (AFOSR)
- Created
-
2010-12-01Created from EPrint's datestamp field
- Updated
-
2019-10-03Created from EPrint's last_modified field
- Caltech groups
- Guggenheim Jet Propulsion Center, GALCIT
- Other Numbering System Name
- Guggenheim Jet Propulsion Center