Porous fuel injection with oxygen enrichment in a viable scramjet engine

Capra, Bianca R. (2014) Porous fuel injection with oxygen enrichment in a viable scramjet engine. In Chowdhury, Harun & Alam, Firoz (Eds.) The Proceedings of the 19th Australasian Fluid Mechanics Conference, RMIT University, Melbourne, Australia.


Oxygen enriched, porous fuel injection has been numerically investigated in this study with the aim of understanding mixing and combustion enhancements achievable in a viable scramjet engine. Four injection configurations were studied: a fuel only case, a pre-mixed case and two staged injection cases where fuel and oxidiser were injected independently. All simulations were performed on a flight scale vehicle at Mach 8 flow conditions. Results show that the addition of oxygen with the fuel increases the mixing efficiency of the engine, however, is less sensitive to the method of oxygen addition: premixed versus staged. When the fuel-oxidiser-air mixture was allowed to combust, the method of additional oxygen delivery had a more significant impact. For pre-mixed fuel and oxidiser, the engine was found to choke, whereas in contrast, in the staged enrichment cases the engine failed to ignite. This result indicates that there exists an optimised configuration between pre-mixed and staged oxygen enrichment which results in a started, and combusting engine.

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ID Code: 79443
Item Type: Conference Paper
Refereed: Yes
Additional URLs:
Keywords: Scramjets, Porous, Fuel Injection
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > AEROSPACE ENGINEERING (090100) > Hypersonic Propulsion and Hypersonic Aerodynamics (090107)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > INTERDISCIPLINARY ENGINEERING (091500) > Computational Fluid Dynamics (091501)
Divisions: Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2014 [please consult the authors]
Deposited On: 16 Dec 2014 05:54
Last Modified: 22 Jun 2017 14:47

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