Modeling of mean flame shape during premixed flame flashback in turbulent boundary layers

A. Gruber, A. R. Kerstein, D. Valiev, C. K. Law, H. Kolla, J. H. Chen

Research output: Contribution to journalConference article

23 Scopus citations

Abstract

Direct numerical simulations of freely-propagating premixed flames in the turbulent boundary layer of fully-developed turbulent channel flows are used for a priori validation of a new model that aims to describe the mean shape of the turbulent flame brush during flashback. Comparison with the DNS datasets, for both fuel-lean and fuel-rich mixture conditions and for Damköhler numbers lower and larger than unity, shows that the model is able to capture the main features of the flame shape. Although further a priori and a posteriori validation is required, particularly at higher Reynolds numbers, this new simple model seems promising and can potentially have impact on the design process of industrial combustion equipment.

Original languageEnglish (US)
Pages (from-to)1485-1492
Number of pages8
JournalProceedings of the Combustion Institute
Volume35
Issue number2
DOIs
StatePublished - 2015
Event30th International Symposium on Combustion - Chicago, IL, United States
Duration: Jul 25 2004Jul 30 2004

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Mechanical Engineering
  • Physical and Theoretical Chemistry

Keywords

  • Flame propagation
  • Flame shape model
  • Turbulent channel flow
  • Turbulent premixed flame

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