Structure and stabilization mechanism of a microjet methane diffusion flame near extinction

C. P. Chen, Y. C. Chao, T. S. Cheng, G. B. Chen, C. Y. Wu

Research output: Contribution to journalConference articlepeer-review

29 Citations (Scopus)

Abstract

The flame structure and stabilization mechanism of a microjet methane diffusion flame near extinction are numerically investigated using multi-component transport model coupled with GRI-Mech 3.0 chemical kinetic mechanisms. The small flame size and intensive heat loss to the burner wall suggest that the microjet flame may always operate in a severe condition near extinction with distinct stabilization feature. Of particular interest is the flame structure in the standoff region, as it would directly relate to the mixing, diffusion, and chemical kinetic processes as well as flame stabilization. Computed results show that near extinction the fuel burns in a diffusion flame, in contradiction to a simple jet flame prediction. Neither a double flame nor a triple flame is observed in the computed structures, suggesting that the standoff flame is stabilized by the hot zone that connects to the reaction kernel, through the formation of HO2 layer and subsequent key radical reactions.

Original languageEnglish
Pages (from-to)3301-3308
Number of pages8
JournalProceedings of the Combustion Institute
Volume31 II
Issue number2
DOIs
Publication statusPublished - 2007
Event31st International Symposium on Combustion - Heidelberg, Germany
Duration: 2006 Aug 52006 Aug 11

All Science Journal Classification (ASJC) codes

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

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