A numerical study of polydisperse spray flame ignition and extinction fronts in a mixing layer

J. B. Greenberg, L. S. Kagan, G. I. Sivashinsky

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

A new numerical study of laminar polydisperse flame ignition and extinction fronts in a mixing layer resulting from opposed streams of fuel and oxidant is presented. Two quite different initial droplet size distributions having the same Sauter mean diameter (SMD) are considered. The phenomenon of hysteresis is found to occur for a high initial droplet load but disappears as the latter decreases. The range of strain rate values for which hysteresis is prevalent depends on the initial size distribution. For example, whilst under certain operating conditions, an extinction front may result from using one initial droplet size distribution, use of another size distribution, even having the same SMD, can exhibit hysteresis. Other features of the influence of the initial spray polydispersity are discussed in depth.

Original languageEnglish
Pages (from-to)1053-1066
Number of pages14
JournalCombustion Theory and Modelling
Volume17
Issue number6
DOIs
StatePublished - 2013

Funding

FundersFunder number
Lady Davis Fellowship Trust, Hebrew University of Jerusalem
United States-Israel Binational Science Foundation2012-057
Israel Science Foundation335/13
Health Care and Promotion Fund

    Keywords

    • extinction front
    • ignition front
    • mixing layer
    • polydisperse spray
    • spray flame

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