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Supersonic Boundary-Layer Combustion: Effects of Upstream Entropy and Shear-Layer Thickness

Kirchhartz, Rainer M. and Mee, David J. and Stalker, Raymond J. and Jacobs, Peter A. and Smart, Michael K. (2010) Supersonic Boundary-Layer Combustion: Effects of Upstream Entropy and Shear-Layer Thickness. Journal of Propulsion and Power, 26 (1), pp. 57-66. American Institute of Aeronautics and Astronautics (AIAA). doi: 10.2514/1.44485. ISSN 0748-4658.

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Official URL: http://dx.doi.org/10.2514/1.44485


There is much interest in the way in which fuel is injected into scramjet combustors and the way this influences ignition and combustion. Experiments were conducted in the T4 Stalker Tube to assess the combustion of hydrogen when it is injected directly into the boundary layer of a circular constant-area supersonic combustion chamber (M > 4). The wall-layer conditions at the fuel-injection station were varied to study the effects on the ignition and combustion of the injected hydrogen. This was achieved by varying the leading-edge bluntness and the length of the constant-area inlet upstream of the annular fuel-injection slot that delivers fuel as a layer underneath the existing boundary layer. Flow properties at the injection location calculated using computational fluid dynamics are presented as well as experimental data and analytical predictions of the pressure distributions along the combustion chamber wall. It is shown that a thicker boundary layer promotes combustion and that leading-edge bluntness, which leads to more hot gas near the walls, is more effective for ignition.

Item URL in elib:https://elib.dlr.de/82118/
Document Type:Article
Title:Supersonic Boundary-Layer Combustion: Effects of Upstream Entropy and Shear-Layer Thickness
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Mee, David J.University of Queensland, Brisbane, AustralienUNSPECIFIEDUNSPECIFIED
Stalker, Raymond J.University of Queensland, Brisbane, AustralienUNSPECIFIEDUNSPECIFIED
Smart, Michael K.University of Queensland, Brisbane, AustralienUNSPECIFIEDUNSPECIFIED
Date:January 2010
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
Page Range:pp. 57-66
Publisher:American Institute of Aeronautics and Astronautics (AIAA)
Keywords:Scramjet, shock tunnel, skin-friction, boundary layer combustion
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:other
DLR - Research area:Raumfahrt
DLR - Program:R - no assignment
DLR - Research theme (Project):R - no assignment
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Space Systems > Transport and Propulsion System
Space Operations and Astronaut Training > Mobile Rocket Base
Deposited By: Kirchhartz, Rainer
Deposited On:26 Apr 2013 10:30
Last Modified:08 Mar 2018 18:44

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