Asymptotic analysis of radiation extinction of stretched premixed flames

Yiguang Ju, Goro Masuya, Fengshan Liu, Yuji Hattori, Dirk Riechelmann

Research output: Contribution to journalArticle

20 Scopus citations

Abstract

The flammability limit, radiation extinction of stretched premixed flame and effect of non-unity Lewis numbers are analyzed by the large-activation-energy asymptotic method. Particular attention is paid to the effect of Lewis number, the upstream and downstream radiation heat losses as well as the non-linearity of radiation. Explicit expressions for the flame temperature, extinction limit and flammability limit are obtained. The C-shaped extinction curve is reproduced. The dependence of radiation heat loss and the Lewis number effect on the stretch rate and flame separation distance is investigated. The effects of fuel Lewis number, oxidizer Lewis number, upstream radiation heat loss and the non-linearity of radiation on the C-shaped extinction curve are also examined. The results demonstrate a significant influence of these parameters on the radiation extinction and flammability limit and provide a good explanation to the experimental results and numerical simulations.

Original languageEnglish (US)
Pages (from-to)231-239
Number of pages9
JournalInternational Journal of Heat and Mass Transfer
Volume43
Issue number2
DOIs
StatePublished - Jan 2000
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

Keywords

  • Asymptotic analysis
  • Flammability limit
  • Radiation extinction
  • Stretched premixed flame

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