Knapp, Bernhard and Farago, Zoltan and Oschwald, Michael (2007) Interaction of LOX/GH2-Spray Combustion with Acoustics. 45th Aerospace Sciences Meeting, 2007-01-09, Reno, NV (USA).
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Abstract
The response of a cryogenic LOX/H2-spray flame to acoustic pressure and velocity fluctuations has be investigated experimentally for pressure levels up to p=1MPa. The dimensions of the combustion chamber are chosen to have transversal acoustic modes at eigenfrequencies representative to full scale rocket combustors. A siren wheel periodically opening a secondary nozzle was used to excite pressure oscillations in the cylindrical combustor at levels up to p'/p~10%. It has been found that the secondary nozzle detunes the eigenfrequencies of the cylindrical resonator in a characteristic way. A 2D-modal analysis of the acoustic behavior of the resonance volume has been done and results agree very well with the experimental findings. By analyzing the temporal and spatial distribution of the flame response to the acoustic excitation the question is addressed whether there is a coupling of combustion and acoustics and whether this coupling is due to velocity or pressure sensitive processes. From the experimental data it is concluded that there is a positive coupling, and the coupling is due to pressure sensitive processes.
Item URL in elib: | https://elib.dlr.de/53080/ | ||||||||||||
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Document Type: | Conference or Workshop Item (Speech, Paper) | ||||||||||||
Title: | Interaction of LOX/GH2-Spray Combustion with Acoustics | ||||||||||||
Authors: |
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Date: | January 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, rocket propulsion, acoustics | ||||||||||||
Event Title: | 45th Aerospace Sciences Meeting | ||||||||||||
Event Location: | Reno, NV (USA) | ||||||||||||
Event Type: | international Conference | ||||||||||||
Event Dates: | 2007-01-09 | ||||||||||||
Organizer: | AIAAA | ||||||||||||
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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