Large eddy simulation of soot formation in turbulent premixed flame

H. El-Asrag, S. Menon, T. Lu, Chung King Law

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

A subgrid model for soot dynamics is developed for large-eddy simulation (LES). The model uses a Method of Moments approach with Lagrangian Interpolative Closure (MOMIC) so that no a priori knowledge of the particles distribution is required. The soot model is implemented within a subgrid mixing and combustion model so that the reaction-diffusion-MOMIC coupling is possible without requiring ad hoc filtering. A relatively detailed multi-species ethylene-air kinetics is employed for the gas phase combustion, and is used here to study the effect of employing a detailed species variable diffusion coefficients on soot production in turbulent premixed flames. The results show that the variable transport properties affect the general structure of the flame in the form of wider curvature probability density function tails and higher turbulent flame speed. In addition, the effect on the relative thermal to molecular diffusivity in the subgrid level (Lewis number effect) changes the surface growth rate and the soot production level.

Original languageEnglish (US)
Title of host publicationCollection of Technical Papers - 44th AIAA Aerospace Sciences Meeting
Pages1825-1842
Number of pages18
StatePublished - 2006
Event44th AIAA Aerospace Sciences Meeting 2006 - Reno, NV, United States
Duration: Jan 9 2006Jan 12 2006

Publication series

NameCollection of Technical Papers - 44th AIAA Aerospace Sciences Meeting
Volume3

Other

Other44th AIAA Aerospace Sciences Meeting 2006
CountryUnited States
CityReno, NV
Period1/9/061/12/06

All Science Journal Classification (ASJC) codes

  • Space and Planetary Science
  • Aerospace Engineering

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