Extinction and structure of ultra lean premixed flame formed in opposite flow

Yuji Yahagi, Masao Takeuchi

研究成果: Article査読

2 被引用数 (Scopus)

抄録

Extinction and structure of ultra lean premixed flame formed in opposite flow has been studied experimentally. Two different concentration mixtures, extremely lean premixed gas and lean premixed gas, impinged on each other. The bulk stretch rate were varied from 80-s to 270-s, and the Lewis number (Le) were varied from 0.99 to 1.85. The local stretch rate due to flow divergence and the stagnation point were estimated by measuring the centerline velocity profile with LDV and the reaction zone was identified by OH profiles using PLIF (Planar Laser-Induced Fluorescence). The extinction behavior depends on the mixture property and the flow strain rate. For small strain rate and Le>1, the extinction limit is nearly constant regardless'of super lean premixed gas condition. On the other hand, for Le<1 and the strain rate large, ultra lean premixed gas interacts with lean premixed gas and the stable region extends to the lower fuel concentration zone.

本文言語English
ページ(範囲)1108-1114
ページ数7
ジャーナルNihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
65
631
DOI
出版ステータスPublished - 1999
外部発表はい

ASJC Scopus subject areas

  • 凝縮系物理学
  • 機械工学

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