Effect of Streamwise Vortices on Scramjets Porthole Injection Mixing

Gomez, Juan Ramon Llobet, Jahn, Ingo H. and Gollan, Rowan (2015). Effect of Streamwise Vortices on Scramjets Porthole Injection Mixing. In: International Space Planes and Hypersonic Systems and Technologies Conferences. 20th AIAA International Space Planes and Hypersonic Systems and Technologies Conference, Glasgow, Scotland, (). 6-9 July 2015. doi:10.2514/6.2015-3597

Attached Files (Some files may be inaccessible until you login with your UQ eSpace credentials)
Name Description MIMEType Size Downloads

Author Gomez, Juan Ramon Llobet
Jahn, Ingo H.
Gollan, Rowan
Title of paper Effect of Streamwise Vortices on Scramjets Porthole Injection Mixing
Conference name 20th AIAA International Space Planes and Hypersonic Systems and Technologies Conference
Conference location Glasgow, Scotland
Conference dates 6-9 July 2015
Convener AIAA
Proceedings title International Space Planes and Hypersonic Systems and Technologies Conferences
Place of Publication Reston, VA United States
Publisher AIAA
Publication Year 2015
Sub-type Fully published paper
DOI 10.2514/6.2015-3597
Open Access Status Not Open Access
ISBN 9781624103209
Total pages 9
Collection year 2016
Language eng
Formatted Abstract/Summary
The use of Scramjets for space access could lead to important reductions in cost for satellite placement in Low Earth Orbit (LEO) and Sun-synchronous Orbit (SSO). The design of a fully operating Scramjet has proven extremely challenging, due to different issues. One of these is efficient fuel-air mixing, a prerequisite for efficent fuel combustion within the short air residence time during supersonic combustion. It has been suggested that streamwise vortices, either naturally generated by the Scramjet intake geometry, or artificially generated by vortex generators, could be used to enhance the mixing rate of
fuel in air. This work presents a numerical study of the interaction between the fuel plume of a porthole injector and streamwise vortices, with focus on the effect on mixing. Flow conditions representative of a Mach 12 flight and equivalent ground-based Scramjet test conditions are investigated. The results show a significant enhancement in fuel penetration
and mixing.  This numerical investigation quantifies the increase in mixing efficiency that can be attained in a canonical geometry by tailoring the fuel jet location to exploit naturally occurring streamwise vortices. Three different vortex intensities, two different injector locations and two different injection to free stream momentum ratios are investigated. The relevant mechanisms driving the mixing enhancement and the best injector location are identified.
Q-Index Code E1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Conference Paper
Collections: School of Mechanical & Mining Engineering Publications
Non HERDC
 
Versions
Version Filter Type
Citation counts: Google Scholar Search Google Scholar
Created: Thu, 08 Oct 2015, 23:56:39 EST by Ingo Jahn on behalf of School of Mechanical and Mining Engineering