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

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

Full text not available from this repository.

Abstract

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).

Document Type:Conference or Workshop Item (Speech, Paper)
Title:Parametric Study of Injection Conditions with Co-axial Injection of Gaseous Hydrogen and Liquid Oxygen
Authors:
AuthorsInstitution or Email of Authors
Webster, S.Samuel.Webster@dlr.de
Hardi, J.Justin.Hardi@dlr.de
Oschwald, M.Michael.Oschwald@dlr.de
Date:September 2011
Journal or Publication Title:Proceedings
Refereed publication:Yes
In ISI Web of Science:No
Status:Published
Keywords:injection, hydrogen
Event Title:60. Deutscher Luft- und Raumfahrtkongress
Event Location:Bremen, Deutschland
Event Type:international Conference
Event Dates:27. - 29. Sept. 2011
Organizer:DGLR
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 > Raketenantriebe
Deposited By: Michaela Hanke
Deposited On:30 Nov 2011 11:42
Last Modified:23 Jan 2012 11:06

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