Extinction Mechanism of Lean Premixed Flames in a Laminar Stagnation Point Flow

Yuji Yahagi, Toshihisa Ueda, Masahiko Mizomoto

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Effects of heat loss and flame stretch on the lean-limit extinction of laminar premixed flames in a stagnation point flow have been studied experimentally. The bulk stretch rate was varied from 40 s-1 to 420 s-1 while the Lewis number (Le) was varied from 0.85 to 1.8. The extinction of the lean propane/air flame (Le>1) is mainly caused by the flame stretch. On the other hand, the extinction of lean methane/air and lean methane/CCVC flames (Le<1) is caused not only by flame stretch but also by heat loss, since the flame is intensified by the Lewis number effect. Therefore, heat loss is predominant in the case of the lean methane/CO2-O2 flame whose Lewis number is smaller than that of the lean methane/air flame.

Original languageEnglish
Pages (from-to)2878-2883
Number of pages6
JournalTransactions of the Japan Society of Mechanical Engineers Series B
Volume58
Issue number553
DOIs
Publication statusPublished - 1992
Externally publishedYes

Keywords

  • Combustion Phenomena
  • Extinction
  • Flame Stretch
  • Heat Loss
  • Laminar Stagnation Point Flow
  • Laser Tomography
  • Premixed Combustion

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering

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