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Injector-Driven Flame Dynamics in a High-Pressure Multi-Element Oxygen–Hydrogen Rocket Thrust Chamber

Armbruster, Wolfgang and Hardi, Justin and Suslov, Dmitry and Oschwald, Michael (2019) Injector-Driven Flame Dynamics in a High-Pressure Multi-Element Oxygen–Hydrogen Rocket Thrust Chamber. Journal of Propulsion and Power, 35 (3). American Institute of Aeronautics and Astronautics (AIAA). doi: 10.2514/1.B37406. ISSN 0748-4658.

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This work addresses the nature of supercritical hydrogen-oxygen flame coupling to acoustics through visualization under conditions representative of upper-stage rocket engines. A research thrust chamber that shows self-excited combustion instabilities for certain operating conditions was used. Previous analysis proved that the instabilities are connected to injector acoustics. In this study a small ptical access window was mounted in the chamber wall. Highspeed flame radiation imaging of UV and blue wavelengths has been applied in order to analyze the acoustic-flame interaction of one of the 42 flames. Dynamic mode decomposition results for a case with 80-bar chamber pressure showed that the flame dynamics are strongly influenced by the LOX injector acoustics, whereas for a 50-bar chamber pressure load point no flame response to injector acoustics was observed. A potential source of acoustic excitation in the oxygen injectors based on hydrodynamic effects is consistent with the observations from the two load points.

Item URL in elib:https://elib.dlr.de/132324/
Document Type:Article
Title:Injector-Driven Flame Dynamics in a High-Pressure Multi-Element Oxygen–Hydrogen Rocket Thrust Chamber
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Armbruster, WolfgangUNSPECIFIEDhttps://orcid.org/0000-0002-4859-4173UNSPECIFIED
Hardi, JustinUNSPECIFIEDhttps://orcid.org/0000-0003-3258-5261UNSPECIFIED
Suslov, DmitryUNSPECIFIEDhttps://orcid.org/0000-0002-5160-9292UNSPECIFIED
Oschwald, MichaelUNSPECIFIEDhttps://orcid.org/0000-0002-9579-9825UNSPECIFIED
Journal or Publication Title:Journal of Propulsion and Power
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Publisher:American Institute of Aeronautics and Astronautics (AIAA)
Keywords:combustion; instability
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Transportation
DLR - Research area:Raumfahrt
DLR - Program:R RP - Space Transportation
DLR - Research theme (Project):R - Antriebsystemtechnik - Schubkammertechnologie (old)
Location: Lampoldshausen
Institutes and Institutions:Institute of Space Propulsion > Rocket Propulsion
Deposited By: Hanke, Michaela
Deposited On:20 Dec 2019 08:50
Last Modified:03 Nov 2023 09:51

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