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In relation to this article, we declare that there is no conflict of interest.
Publication history
Received July 12, 2016
Accepted March 20, 2017
articles This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Propagation speed of wrinkled premixed flames within stoichiometric hydrogen-air mixtures under standard temperature and pressure

School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China
Korean Journal of Chemical Engineering, June 2017, 34(6), 1846-1857(12), 10.1007/s11814-017-0084-3
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Abstract

To explore the influence mechanism of initial turbulence on propagation speed of wrinkled flames, the turbulent combustion behavior of wrinkled stoichiometric hydrogen premixed flames was studied in a spherical fanstirred closed vessel under standard temperature and pressure. The variations on flame structure were first observed; turbulent flames first were distorted and then became cellular, and both first and second critical flame radii of cellularity declined with a increased rate as turbulent intensity rose. Then, the variations of stretch effects were compared to laminar flame; the global stretch rate on turbulent flame at a same flame size was raised while the enhancement extent was obviously enlarged with the increase of initial turbulent intensity and/or the growth of flame size. Finally, the variation regulations of propagation speed induced by varying turbulent intensity were analyzed; the nexus between propagation_x000D_ speed and initial turbulence was discussed with the considerations of cellularity phenomenon and stretch effects.

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