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Supersonic Skin-Friction Drag with Tangential Wall Slot Fuel Injection and Combustion

Kirchhartz, Rainer M. and Mee, David J. and Stalker, Raymond J. (2012) Supersonic Skin-Friction Drag with Tangential Wall Slot Fuel Injection and Combustion. AIAA Journal, 50 (2), pp. 313-324. American Institute of Aeronautics and Astronautics (AIAA). DOI: 10.2514/1.J051073 ISSN 0001-1452

Full text not available from this repository.

Abstract

The large viscous drag of hypersonic vehicles is a major obstacle to the successful development of vehicles for prolonged atmospheric travel at high Mach numbers. On such vehicles, this skin-friction drag can be of similar magnitude to that of the inviscid drag on the body. To improve the vehicle’s performance, the net thrust of the propulsion system has to be enhanced, either by increasing the thrust force or by reducing the vehicle drag. Here, reductions in viscous drag can offer a large margin for improvement of the net thrust level. One of the methods for the reduction of supersonic skin friction is the injection of low-density gas into the boundary layer (film cooling). In a recent development, film cooling by slot injection of hydrogen was combined with its combustion within the boundary layer. Analysis and experiments indicated substantial reductions of supersonic skin-friction drag. This paper provides further evidence for substantial skin-friction reductions by presenting shock-tunnel data of direct drag measurements in a circular supersonic combustion chamber with and without pressure gradients and with and without combustion of hydrogen in the boundary layer. The measurements are compared with theories, and the influence of entropy layers and combustor size is investigated. Measurements show a reduction of viscous drag of up to 77%.

Item URL in elib:https://elib.dlr.de/82113/
Document Type:Article
Title:Supersonic Skin-Friction Drag with Tangential Wall Slot Fuel Injection and Combustion
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Kirchhartz, Rainer M.rainer.kirchhartz (at) dlr.deUNSPECIFIED
Mee, David J.University of Queensland, Brisbane, Queensland 4072, AustraliaUNSPECIFIED
Stalker, Raymond J.University of Queensland, Brisbane, Queensland 4072, AustraliaUNSPECIFIED
Date:February 2012
Journal or Publication Title:AIAA Journal
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:50
DOI :10.2514/1.J051073
Page Range:pp. 313-324
Publisher:American Institute of Aeronautics and Astronautics (AIAA)
ISSN:0001-1452
Status:Published
Keywords:skin-friction, drag, scramjet, thrust, supersonic combustion, hypersonic
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:Space Operations and Astronaut Training > Mobile Rocket Base
Deposited By: Kirchhartz, Rainer
Deposited On:26 Apr 2013 10:36
Last Modified:08 Mar 2018 18:42

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