Cryogenic oxygen/hydrogen flame response to acoustic excitation in a rectangular rocket combustor

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dc.contributor.authorHardi, J.
dc.contributor.authorOschwald, M.
dc.contributor.authorDally, B.
dc.contributor.conferenceAustralian Combustion Symposium (2011 : Shoal Bay, NSW)
dc.date.issued2011
dc.description.abstractThe interaction of cryogenic oxygen and hydrogen flames with an externally forced acoustic field has been investigated. Tests have been conducted with an injection configuration and combustor operating conditions which are representative of real rocket engines. For the first time, such tests with LOx/H2 propellants and acoustic forcing have been conducted at combustion chamber pressures above 10 bar, the reported results herein from a test at 43.5 bar. Optical access to the combustor allowed the simultaneous high speed recording of hydroxyl radical (OH*) chemiluminescence and backlit shadowgraph images of the flame during periods of forced excitation of acoustic resonance modes of the combustion chamber. Significant changes in the structure of the flame were observed during periods of acoustic resonance; primarily in the length of the flame and distribution of heat release. These observations are discussed with respect to feedback mechanisms in naturally occurring combustion instability.
dc.description.statementofresponsibilityJ. Hardi, M. Oschwald and B. Dally
dc.description.urihttp://elib.dlr.de/72124/
dc.identifier.citationProceedings of the Australian Combustion Symposium, held at Shoal Bay, NSW, 29 November-1st December, 2011: pp.1-5
dc.identifier.urihttp://hdl.handle.net/2440/74378
dc.language.isoen
dc.publisherThe Combustion Institute
dc.publisher.placeAustralia
dc.rightsCopyright status unknown
dc.subjectCombusion instabilities
dc.subjectliquid propellant rocket engines
dc.subjectcoaxial spray flame
dc.subjectcryogenic
dc.titleCryogenic oxygen/hydrogen flame response to acoustic excitation in a rectangular rocket combustor
dc.typeConference paper
pubs.publication-statusPublished

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