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Journal of Combustion
Volume 2016, Article ID 1069873, 14 pages
http://dx.doi.org/10.1155/2016/1069873
Research Article

On Laminar Rich Premixed Polydisperse Spray Flame Propagation with Heat Loss

Faculty of Aerospace Engineering, Technion-Israel Institute of Technology, 32000 Haifa, Israel

Received 22 November 2015; Revised 4 February 2016; Accepted 7 February 2016

Academic Editor: Ashwani K. Gupta

Copyright © 2016 G. Kats and J. B. Greenberg. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A mathematical analysis of laminar premixed spray flame propagation with heat loss is presented. The analysis makes use of a distributed approximation of the Arrhenius exponential term in the reaction rate expression and leads to an implicit expression for the laminar burning velocity dependent on the spray-related parameters for the fuel, gas-related parameters and the intensity of the heat losses. It is shown that the initial droplet load, the value of the evaporation coefficient, and the initial size distribution are the spray-related parameters which exert an influence on the onset of extinction. The combination of these parameters governs the manner in which the spray heat loss is distributed spatially and it is this feature that is the main factor, when taken together with volumetric heat loss, which determines the spray’s impact on flame propagation and extinction.