Characterization of the eddy dissipation model for the analysis of hydrogen-fueled scramjets

Hoste, J.J.O.E., Fossati, M., Taylor, I.J. and Gollan, R.J. (2019) Characterization of the eddy dissipation model for the analysis of hydrogen-fueled scramjets. Aeronautical Journal, 123(1262), pp. 536-565. (doi:10.1017/aer.2018.169)

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Abstract

The eddy dissipation model (EDM) is analysed with respect to the ability to address the turbulence–combustion interaction process inside hydrogen-fuelled scramjet engines designed to operate at high Mach numbers (≈7–12). The aim is to identify the most appropriate strategy for the use of the model and the calibration of the modelling constants for future design purposes. To this end, three hydrogen-fuelled experimental scramjet configurations with different fuel injection approaches are studied numerically. The first case consists of parallel fuel injection and it is shown that relying on estimates of ignition delay from a 1D kinetics program can greatly improve the effectiveness of the EDM. This was achieved through a proposed zonal approach. The second case considers fuel injection behind a strut. Here the EDM predicts two reacting layers along the domain which is in agreement with experimental temperature profiles close to the point of injection but not the case any more at the downstream end of the test section. The first two scramjet test cases demonstrated that the kinetic limit, which can be applied to the EDM, does not improve the predictions in comparison to experimental data. The last case considered a transverse injection of hydrogen and the EDM approach provided overall good agreement with experimental pressure traces except in the vicinity of the injection location. The EDM appears to be a suitable tool for scramjet combustor analysis incorporating different fuel injection mechanisms with hydrogen. More specifically, the considered test cases demonstrate that the model provides reasonable predictions of pressure, velocity, temperature and composition.

Item Type:Articles
Additional Information:This work was supported by the Royal Society of Edinburgh through the J.M. Lessells scholarship, the University of Strathclyde and the University of Glasgow through the Mac Robertson scholarship. Results were obtained using the EPSRC funded ARCHIE-WeSt High Performance Computer (www.archie-west.ac.uk). EPSRC Grant no. EP/K000586/1.
Keywords:Eddy dissipation modeling, scramjet performance analysis, turbulencechemistry interaction.
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Taylor, Dr Ian
Authors: Hoste, J.J.O.E., Fossati, M., Taylor, I.J., and Gollan, R.J.
Subjects:T Technology > T Technology (General)
T Technology > TL Motor vehicles. Aeronautics. Astronautics
College/School:College of Science and Engineering > School of Engineering > Aerospace Sciences
Journal Name:Aeronautical Journal
Journal Abbr.:Aeronaut J
Publisher:Cambridge University Press
ISSN:0001-9240
ISSN (Online):2059-6464
Published Online:27 March 2019
Copyright Holders:Copyright © 2019 Royal Aeronautical Society
First Published:First published in Aeronautical Journal 123(1262):536-565
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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