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Parametric Study of Injection Conditions with Co-axial Injection of Gaseous Hydrogen and Liquid Oxygen

Webster, S. and Hardi, Justin and Oschwald, Michael (2011) Parametric Study of Injection Conditions with Co-axial Injection of Gaseous Hydrogen and Liquid Oxygen. In: Proceedings. 60. Deutscher Luft- und Raumfahrtkongress, 2011-09-27 - 2011-09-29, Bremen, Deutschland.

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High frequency instability is an on going danger to the successful operation and development of new liquid propellant rocket engines. The highly destructive nature of high frequency instability can result in safety risks and costly delays in engine development programs. Further understanding of the mechanisms and parameters that affect combustion stability can be used to further limit these dangers. The rectangular combustor designated ‘BkH’ was developed to study flame-acoustic interaction under forced excitation for both sub and super critical conditions. This paper presents a preliminary parametric study undertaken during run in testing of the new ‘BkH’ hardware. The focus is on the affects of oxidizer to fuel ratio and velocity ratio on the roughness of combustion for warm GH2 at sub and super critical pressures. It was found that higher injection velocity ratio increased the energy content of high frequency acoustic energy for warm GH2 and that higher oxidizer to fuel ratio produced less combustion roughness. This trend is inconsistent with observations presented by Wanhainen et al (1966).

Item URL in elib:https://elib.dlr.de/72132/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:Parametric Study of Injection Conditions with Co-axial Injection of Gaseous Hydrogen and Liquid Oxygen
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Hardi, JustinUNSPECIFIEDhttps://orcid.org/0000-0003-3258-5261UNSPECIFIED
Oschwald, MichaelUNSPECIFIEDhttps://orcid.org/0000-0002-9579-9825UNSPECIFIED
Date:September 2011
Journal or Publication Title:Proceedings
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:injection, hydrogen
Event Title:60. Deutscher Luft- und Raumfahrtkongress
Event Location:Bremen, Deutschland
Event Type:international Conference
Event Start Date:27 September 2011
Event End Date:29 September 2011
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 > Rocket Propulsion
Deposited By: Hanke, Michaela
Deposited On:30 Nov 2011 11:42
Last Modified:24 Apr 2024 19:37

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