Numerical investigation of transverse jets through multi-port injector arrays in a supersonic crossflow

Pudsey, Adrian S. and Boyce, Russell R. (2008). Numerical investigation of transverse jets through multi-port injector arrays in a supersonic crossflow. In: 15th Aiaa International Space Planes and Hypersonic Systems and Technologies Conference 2008. 15th AIAA International Space Planes and Hypersonic Systems and Technologies Conference, Dayton, U.S., (). 28 April - 1 May, 2008.

Author Pudsey, Adrian S.
Boyce, Russell R.
Title of paper Numerical investigation of transverse jets through multi-port injector arrays in a supersonic crossflow
Conference name 15th AIAA International Space Planes and Hypersonic Systems and Technologies Conference
Conference location Dayton, U.S.
Conference dates 28 April - 1 May, 2008
Proceedings title 15th Aiaa International Space Planes and Hypersonic Systems and Technologies Conference 2008
Place of Publication Red Hook, U.S.
Publisher Curran Associates
Publication Year 2008
Sub-type Fully published paper
Open Access Status
ISBN 9781605604459
Language eng
Formatted Abstract/Summary
A three-dimensional numerical study has been performed of the effects of sonic gaseous hydrogen injection through multiple transverse injectors subjected to a supersonic crossflow. Solutions were obtained for a series of injection congurations in a Mach 4.0 crossflow, with a global equivalence ratio of Ø = 0:5. Results indicate a different flow structure than for a typical single jet, with the development of two clearly defined wake vortices, including a stagnation point and reversed  flow region immediately behind each downstream jet. Other observations include an improvement in total pressure recovery due to reduced blow shock strength, and increased local heating in the vicinity of the first 2 jets resulting from insurgence of hot boundary layer air between the injectors. While the overall penetration was reduced under the investigated conditions, signicant improvements were observed when non-dimensionalising against the equivalent jet diameter for each modelled injector row. This was found to be the result of increased jet-to-freestream momentum ratio due to the subsonic flow regions between each injector. Further enhancements were also observed in terms of mixing performance for the multi-jet cases. Improvements of up to 68 percent in near field mixing efficiency were experienced by using multiple jets due to increased mixant interface area and intermediate stirring through wake vortices between each injector. No improvement in far field mixing was observed. Overall, it has been demonstrated that there are benefits to be gained through the injection of gaseous hydrogen from many small injectors rather than fewer large injectors.
Subjects 0901 Aerospace Engineering
Keyword Transverse jets
Supersonic crossflow
Q-Index Code EX
Q-Index Status Provisional Code

 
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Created: Wed, 24 Feb 2010, 15:55:56 EST by Tara Johnson on behalf of Faculty Of Engineering, Architecture & Info Tech