Effect of an external electric field on the propagation velocity of premixed flames
KAUST Grant Number025478
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Abstract© 2014 The Combustion Institute. Published by Elsevier Inc. All rights reserved. There have been many experimental investigations into the ability of electric fields to enhance combustion by acting upon ion species present in flames . In this work, we examine this phenomenon using a one-dimensional model of a lean premixed flame under the influence of a longitudinal electric field. We expand upon prior two-step chain-branching reaction laminar models with reactions to model the creation and consumption of both a positively-charged radical species and free electrons. Also included are the electromotive force in the conservation equation for ion species and the electrostatic form of the Maxwell equations in order to resolve ion transport by externally applied and internally induced electric fields. The numerical solution of these equations allows us to compute changes in flame speed due to electric fields. Further, the variation of key kinetic and transport parameters modifies the electrical sensitivity of the flame. From changes in flame speed and reactant profiles we are able to gain novel, valuable insight into how and why combustion can be controlled by electric fields.
CitationSánchez-Sanz M, Murphy DC, Fernandez-Pello C (2015) Effect of an external electric field on the propagation velocity of premixed flames. Proceedings of the Combustion Institute 35: 3463–3470. Available: http://dx.doi.org/10.1016/j.proci.2014.05.075.
SponsorsThis collaborative research was supported by the Spanish MCINN under Project #ENE2012-33213 and by King Abdullah University of Science and Technology (KAUST), Cooperative Agreement # 025478 entitled, Electromagnetically Enhanced Combustion: Electric Flames.