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Combustion enhancement in a scramjet engine using oxygen enrichment and porous fuel injection

Capra, Bianca R. and Boyce, Russell R. and Kuhn, Markus and Hald, Hermann (2015) Combustion enhancement in a scramjet engine using oxygen enrichment and porous fuel injection. Journal of Fluid Mechanics, 767, pp. 173-198. Cambidge University Press. DOI: 10.1017/jfm.2015.43 ISSN 0022-1120

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Official URL: http://dx.doi.org/10.1017/jfm.2015.43

Abstract

This paper reports on the experimental testing of oxygen-enriched porous fuel injection in a scramjet engine. Fuel was injected via inlet mounted, oxide-based ceramic matrix composite (CMC) injectors on both flow path surfaces that covered a total of 9.2% of the intake surface area. All experiments were performed at an enthalpy of 3.93–4.25 MJ/kg, flight Mach number 9.2–9.6 and an equivalence ratio of 0.493. At this condition, the engine was shown to be on the verge of achieving appreciable combustion. Oxygen was then added to the fuel prior to injection such that two distinct enrichment levels were achieved. Combustion was found to increase, by as much as 40% in terms of combustion-induced pressure rise, over the fuel-only case with increasing oxygen enrichment. Further, the onset of combustion was found to move upstream with increasing levels of oxygen enrichment. Thrust, both uninstalled and specific, and specific impulse were found to be improved with oxygen enrichment. Enhanced fuel–air mixing due to the pre-mixing of oxygen with the fuel together with the porous fuel injection are believed to be the main contributors to the observed enhanced performance of the tested engine.

Item URL in elib:https://elib.dlr.de/95980/
Document Type:Article
Title:Combustion enhancement in a scramjet engine using oxygen enrichment and porous fuel injection
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Capra, Bianca R.Queensland University of Technology, Brisbane, AustraliaUNSPECIFIED
Boyce, Russell R.University of New South Wales, Canberra, AustraliaUNSPECIFIED
Kuhn, Markusmarkus.kuhn (at) dlr.deUNSPECIFIED
Hald, Hermannhermann.hald (at) dlr.deUNSPECIFIED
Date:March 2015
Journal or Publication Title:Journal of Fluid Mechanics
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:767
DOI :10.1017/jfm.2015.43
Page Range:pp. 173-198
Editors:
EditorsEmail
Worster, Graemgw.jfm@damtp.cam.ac.uk
Linden, Paulp.f.linden@damtp.cam.ac.uk
Charles, Meneveaumeneveau@jhu.edu
Publisher:Cambidge University Press
ISSN:0022-1120
Status:Published
Keywords:combustion, high-speed flow, oxide CMC, porous injection, porous media
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Transport
DLR - Research area:Raumfahrt
DLR - Program:R RP - Raumtransport
DLR - Research theme (Project):R - Raumfahrzeugsysteme - Konzepte und Entwurf, L - Combusion Chamber Technologies (old)
Location: Stuttgart
Institutes and Institutions:Institute of Structures and Design > Space System Integration
Deposited By: Kuhn, Markus
Deposited On:11 Jun 2015 11:06
Last Modified:08 Mar 2018 18:43

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