Characteristics of Lifted Flame Resulting from Impulsive Change of Equivalence Ratio

DOI Web Site 参考文献18件
  • JUN Seong-Hwa
    Department of Ecosystem Engineering, Tokushima University
  • KIDOGUCHI Yoshiyuki
    Department of Ecosystem Engineering, Tokushima University
  • KIM Tae-Kwon
    School of Mechanical and Automotive Engineering, Keimyung University
  • MIWA Kei
    Department of Ecosystem Engineering, Tokushima University

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説明

<p>This study investigated the characteristics of an unsteady lifted flame resulting from an instant change in the concentration difference through comparisons with those of a steady lifted flame to change from a premixed flame to a triple flame with a diffusion trailing flame identified in the middle. The instant change was done by an equivalence ratio conversion system using a solenoid valve and the flame photographs taken by an ICCD camera, were used for data extraction from the two lifted flames. The unsteady lifted flame stayed at for 1.6 seconds only and was classified into three regions, a premixed flame region, a critical flame region, and a triple flame region according to the gradients of the flames' curvature radius, width, lift-off height, and luminescence intensity as done in the steady lifted flame. The result was that the unsteady lifted flame made under a specific condition in this paper, showed a similar tendency in the gradients to the steady lifted flame. That is to say, the behavior of the unsteady lifted flame can be predicted based on the behavior of a steady lifted flame.</p>

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  • 日本燃焼学会誌

    日本燃焼学会誌 50 (152), 145-151, 2008

    一般社団法人 日本燃焼学会

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