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Investigation of the Combustion Chamber Acoustics and its Interaction with LOX/H<sub>2</sub>-Spray Flames

Oschwald, Michael and Knapp, Bernhard (2007) Investigation of the Combustion Chamber Acoustics and its Interaction with LOX/H<sub>2</sub>-Spray Flames. In: 2nd EUCASS 2007. 2nd EUCASS 2007, 2007-07-01 - 2007-07-06, Brussels.

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Abstract

The acoustics of combustion chambers is investigated experimentally in cold flow and hot fire tests. The performance of absorber elements is analyzed in respect to their effect on combustion chamber eigenfrequencies as well as to their damping characteristics. It is shown that predictions of 2D- and 3D-modal analysis of the chamber acoustics are in very good agreement with measurements. In hot fire tests a burning LOX/H<sub>2</sub> spray is acoustically excited with a siren wheel and the combustion response is recorded with dynamic pressure sensors and by high speed visualization of the spray and the flame. Although no combustion instability could be observed, analyzing the temporal and spatial distribution of the flame response allowed addressing the question, whether the coupling of acoustics to combustion is via pressure or velocity sensitive processes.

Item URL in elib:https://elib.dlr.de/53116/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:Investigation of the Combustion Chamber Acoustics and its Interaction with LOX/H<sub>2</sub>-Spray Flames
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Oschwald, MichaelUNSPECIFIEDUNSPECIFIED
Knapp, BernhardUNSPECIFIEDUNSPECIFIED
Date:2007
Journal or Publication Title:2nd EUCASS 2007
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:combustion, instability
Event Title:2nd EUCASS 2007
Event Location:Brussels
Event Type:international Conference
Event Dates:2007-07-01 - 2007-07-06
Organizer:EUCASS
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W RP - Raumtransport
DLR - Research area:Space
DLR - Program:W RP - Raumtransport
DLR - Research theme (Project):W - Antriebsystemtechnik - Schubkammertechnologie und Hochdruckverbrennung (old)
Location: Lampoldshausen
Institutes and Institutions:Institute of Space Propulsion > Technologie
Deposited By: Oschwald, Dr.rer.nat. Michael
Deposited On:29 Jan 2008
Last Modified:31 Jul 2019 19:21

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