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Experimental Investigation of Self-Excited Combustion Instabilities in a LOX/LNG Rocket Combustor

Martin, Jan and Armbruster, Wolfgang and Hardi, Justin and Suslov, Dmitry and Oschwald, Michael (2020) Experimental Investigation of Self-Excited Combustion Instabilities in a LOX/LNG Rocket Combustor. In: AIAA Scitech 2020 Forum. AIAA SciTechForum, 2020-10-06 - 2020-10-10, Orlando (FL), USA. doi: 10.2514/6.2020-0423. ISBN 978-162410595-1.

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Official URL: https://arc.aiaa.org/doi/10.2514/6.2020-0423


Two types of combustion instabilities were observed in a multi-injector research combustor with LOX/LNG propellants operating at conditions similar to an upper stage rocket engine. The first was identified as an excited tangential acoustic mode of the combustion chamber and can be explained by coupling with the LOX injectors, similar to the mechanism previously observed in tests with LOX/H2 propellants. The other type is characterized by longitudinal acoustic oscillations with amplitudes of at least 20% of the mean chamber pressure. Analysis of the test data suggests that flashback of a lifted flame is likely to be the trigger mechanism for the second type of instabilities.

Item URL in elib:https://elib.dlr.de/137727/
Document Type:Conference or Workshop Item (Speech)
Title:Experimental Investigation of Self-Excited Combustion Instabilities in a LOX/LNG Rocket Combustor
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Martin, JanUNSPECIFIEDhttps://orcid.org/0000-0002-5050-2506UNSPECIFIED
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:AIAA Scitech 2020 Forum
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:combustion instabilities, liquid propellant rocket engine, LOx/LNG, flame anchoring
Event Title:AIAA SciTechForum
Event Location:Orlando (FL), USA
Event Type:international Conference
Event Start Date:6 October 2020
Event End Date:10 October 2020
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 - Reusable Space Systems and Propulsion Technology
Location: Lampoldshausen
Institutes and Institutions:Institute of Space Propulsion > Rocket Propulsion
Deposited By: Hanke, Michaela
Deposited On:19 Nov 2020 08:32
Last Modified:24 Apr 2024 20:39

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