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Cryogenic Oxygen/Hydrogen Flame Response to Acoustic Excitation in a Rectangular Rocket Combustor

Hardi, J. and Oschwald, M. and Dally, B. (2011) Cryogenic Oxygen/Hydrogen Flame Response to Acoustic Excitation in a Rectangular Rocket Combustor. In: Proceedings of the Australian Combustion Symposium. Australian Combustion Symposium 2011, 29. Nov. - 1. Dec. 2011, Shoal Bay NSW, Australia.

Full text not available from this repository.

Abstract

The interaction of cryogenic oxygen and hydrogen flames with an externally forced acoustic field has been investigated. Tests have been conducted with an injection configuration and combustor operating conditions which are representative of real rocket engines. For the first time, such tests with LOx/H2 propellants and acoustic forcing have been conducted at combustion chamber pressures above 10 bar, the reported results herein from a test at 43.5 bar. Optical access to the combustor allowed the simultaneous high speed recording of hydroxyl radical (OH*) chemiluminescence and backlit shadowgraph images of the flame during periods of forced excitation of acoustic resonance modes of the combustion chamber. Significant changes in the structure of the flame were observed during periods of acoustic resonance; primarily in the length of the flame and distribution of heat release. These observations are discussed with respect to feedback mechanisms in naturally occurring combustion instability.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:Cryogenic Oxygen/Hydrogen Flame Response to Acoustic Excitation in a Rectangular Rocket Combustor
Authors:
AuthorsInstitution or Email of Authors
Hardi, J.Justin.Hardi@dlr.de
Oschwald, M.Michael.Oschwald@dlr.de
Dally, B.University of Adelaide, Australia
Date:December 2011
Journal or Publication Title:Proceedings of the Australian Combustion Symposium
Refereed publication:Yes
In ISI Web of Science:No
Status:Published
Keywords:Combustion instabilities, liquid propellant rocket engines, coaxial spray flame, cryogenic
Event Title:Australian Combustion Symposium 2011
Event Location:Shoal Bay NSW, Australia
Event Type:international Conference
Event Dates:29. Nov. - 1. Dec. 2011
Organizer:University of Newcastle, Australia
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 11:10
Last Modified:23 Jan 2012 11:04

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