Lawal, MS, Fairweather, M, Gubba, SR et al. (5 more authors) (2013) Large eddy simulations of wake-stabilised flares. Fuel Processing Technology, 112. 35 - 47. ISSN 0378-3820
Abstract
This paper investigates the potential benefits, as well as limitations, of using the LES technique to predict the combustion efficiency, emissions and temperatures of wake-stabilised flares. LES calculations have been performed for two jet-to-cross-flow momentum flux ratios, with the results being compared with experimental data, where available, and with predictions of a closed RANS model using a second-moment turbulence closure. The flame fragmentation and the secondary flame zone attached to the release pipe at high jet-to-cross-flow momentum flux ratios, and their influence on the evolution of the counter-rotating vortex pair found in such flames, are discussed in detail, with realistic predictions being produced by the LES. The global mixing characteristics and the combustion efficiency of such flames are also compared with available data with reasonable agreement found. In all cases, LES predictions are found to be superior to equivalent RANS results, although the extra computational effort required in predicting species concentrations and flare efficiencies, in particular, may not be warranted.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | (c) 2013, Elsevier. NOTICE: this is the author’s version of a work that was accepted for publication in Fuel Processing Technology. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Fuel Processing Technology, 112, 2013, 10.1016/j.fuproc.2013.02.018 |
Keywords: | LES; flares; jet-in-cross-flow; counter-rotating vortices; pollutants |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) > Energy Tech & Innovation Initiative (Leeds) The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) > Institute for Particle Science and Engineering (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 07 Jul 2014 11:22 |
Last Modified: | 21 Jan 2018 23:46 |
Published Version: | http://dx.doi.org/10.1016/j.fuproc.2013.02.018 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.fuproc.2013.02.018 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:79575 |