Stability of rich premixed polydisperse spray flames

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

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


A new numerical study of rich laminar polydisperse spray flame propagation in a two-dimensional channel is presented. Two different polydisperse sprays having the same Sauter mean diameter were considered. A constant density model was adopted thereby eliminating the Darrieus-Landau instability. Attention is focused on the development of spray induced instabilities and the way they are sensitive to the initial droplet size distribution. Previous work in this field was based on a linear stability analysis. The current work allows nonlinear stability aspects to be captured. It was found that both cellular and oscillating instabilities can develop, depending on the evaporation coefficient of the liquid fuel. However, the transitions from planar propagation to cellular propagation and from the latter to oscillating propagation occur at different critical values of the evaporation coefficient depending on what the initial droplet size distribution actually is. Therefore, use of the Sauter mean diameter to represent a polydisperse spray can be misleading in the current context and the real size distribution must be considered.

Original languageEnglish
Title of host publication50th Israel Annual Conference on Aerospace Sciences 2010
Number of pages11
StatePublished - 2011
Event50th Israel Annual Conference on Aerospace Sciences 2010 - Tel-Aviv and Haifa, Israel
Duration: 17 Feb 201018 Feb 2010

Publication series

Name50th Israel Annual Conference on Aerospace Sciences 2010


Conference50th Israel Annual Conference on Aerospace Sciences 2010
CityTel-Aviv and Haifa


  • Flame propagation
  • Rich spray flame
  • Stability


Dive into the research topics of 'Stability of rich premixed polydisperse spray flames'. Together they form a unique fingerprint.

Cite this