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Combustion Chamber Acoustics and its Interaction with LOX/H2- and LOX/CH4-Spray Flames

Oschwald, Michael and Knapp, Bernhard and Sliphorst, M. and Marpert, Mark P. (2009) Combustion Chamber Acoustics and its Interaction with LOX/H2- and LOX/CH4-Spray Flames. Transactions of the Japan Society for Aeronautical and Space Sciences, Vol. 7, pp. 97-103. Aerospace Technology Japan.

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The acoustics of combustion chambers and the interaction of acoustics and combustion is investigated in a model combustor operated with LOX/H2 and LOX/CH4. Acoustic excitations are induced by a siren during hot fire tests and the response of atomization and combustion is recorded with dynamic pressure sensors and high speed OH-imaging is applied. By analyzing the temporal and spatial distribution of the flame response the question is addressed, whether in the experiments the coupling of acoustics to combustion is via pressure or velocity sensitive processes. In the experiments it appeared that the acoustic eigenmodes of the combustor are characteristically deviating from cylinder modes. The results obtained can be explained by a modal analyses of the combustor geometry. These investigations have been extended to study the influence of absorbers and absorber rings on the acoustics of combustion chambers and resonance frequencies predicted by modal analysis and experimental results are presented.

Item URL in elib:https://elib.dlr.de/62511/
Document Type:Article
Title:Combustion Chamber Acoustics and its Interaction with LOX/H2- and LOX/CH4-Spray Flames
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Oschwald, MichaelMichael.Oschwald (at) dlr.dehttps://orcid.org/0000-0002-9579-9825
Knapp, BernhardBernhard.Knapp (at) dlr.dehttps://orcid.org/0000-0002-5714-7105
Sliphorst, M.Mark.Sliphorst (at) dlr.deUNSPECIFIED
Marpert, Mark P.Mark.Marpert (at) dlr.deUNSPECIFIED
Journal or Publication Title:Transactions of the Japan Society for Aeronautical and Space Sciences
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Volume:Vol. 7
Page Range:pp. 97-103
Publisher:Aerospace Technology Japan
Keywords:combustion, combustion chamber, acoustics, LH2, LOX
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W - no assignment
DLR - Research area:Space
DLR - Program:W - no assignment
DLR - Research theme (Project):W - no assignment (old)
Location: Lampoldshausen
Institutes and Institutions:Institute of Space Propulsion > Technologie
Deposited By: Hanke, Michaela
Deposited On:13 Jan 2010 15:17
Last Modified:30 May 2019 22:06

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