Combined effects of curvature, radiation, and stretch on the extinction of premixed tubular flames

Zheng Chen, Yiguang Ju

Research output: Contribution to journalArticle

20 Scopus citations

Abstract

The combined effects of flame curvature, radiation, and stretch on the extinction of premixed tubular flames are investigated by using the large-activation-energy asymptotic method with a non-linear radiation model. A general expression for flame speed, flame temperature and extinction limits is obtained and it is used to study the radiation and flame curvature coupling at different Lewis numbers. The results show that the coupling between radiation and flame curvature leads to multiple flame bifurcations and extinction limits. Furthermore, both the stretch and radiation extinction limits are found to be greatly affected by flame curvature.

Original languageEnglish (US)
Pages (from-to)6118-6125
Number of pages8
JournalInternational Journal of Heat and Mass Transfer
Volume51
Issue number25-26
DOIs
StatePublished - Dec 1 2008

All Science Journal Classification (ASJC) codes

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

Keywords

  • Extinction
  • Flame curvature
  • Flame stretch
  • Premixed tubular flame
  • Radiation

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