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Title: Time-Resolved Particle Image Velocimetry of dynamic interactions between hydrogen-enriched methane/air premixed flames and toroidal vortex structures
Authors: Di Sarli, Valeria
Di Benedetto, Almerinda
Long, Edward J.
Hargrave, Graham K.
Keywords: Hydrogen-enrichment
Premixed combustion
Unsteady propagation
Flame-vortex interaction
Time-Resolved Particle Image
Velocimetry
Combustion regimes
Issue Date: 2012
Publisher: © Hydrogen Energy Publications, LLC. Published by Elsevier Ltd.
Citation: DI SARLI, V. ... et al, 2012. Time-Resolved Particle Image Velocimetry of dynamic interactions between hydrogen-enriched methane/air premixed flames and toroidal vortex structures. International Journal of Hydrogen Energy, 37 (21), pp.16201-16213.
Abstract: Time-Resolved Particle Image Velocimetry was used to study transient interactions between hydrogen-enriched methane/air premixed flames and toroidal vortex structures. Lean and stoichiometric mixtures with hydrogen mole fraction in the fuel (hydrogen plus methane), xH2xH2, varying in the range of 0–0.5 were investigated. Results have shown that the hydrogen presence affects the flow field both quantitatively (increase of the velocity of the main toroidal vortex) and qualitatively (generation of different sub-vortices within the main vortex), enhancing the intensity of the interaction. Regardless of the mixture stoichiometry, the hydrogen substitution to methane leads to a transition from a regime in which the vortex only wrinkles the flame front (xH2<0.2xH2<0.2) to a more vigorous regime in which the interaction almost results in the separation of small flame pockets from the main front (xH2>0.2xH2>0.2). This transition was characterised in terms of time histories of flame surface area and burning rate.
Description: NOTICE: this is the author’s version of a work that was accepted for publication in the International Journal of Hydrogen Energy. 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 at: http://dx.doi.org/10.1016/j.ijhydene.2012.08.061
Version: Accepted for publication
DOI: 10.1016/j.ijhydene.2012.08.061
URI: https://dspace.lboro.ac.uk/2134/13439
Publisher Link: http://dx.doi.org/10.1016/j.ijhydene.2012.08.061
ISSN: 0360-3199
Appears in Collections:Published Articles (Mechanical, Electrical and Manufacturing Engineering)

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