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首页> 外文期刊>Combustion Science and Technology >Investigations of Chemiluminescence Characteristics in CH_4/O_2 Jet Diffusion Flames Impinging on the Flat Plate
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Investigations of Chemiluminescence Characteristics in CH_4/O_2 Jet Diffusion Flames Impinging on the Flat Plate

机译：CH_4 / O_2射流扩散火焰撞击平板的化学发光特性研究

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摘要

Chemiluminescence information of the excited state radicals is significant for flame spectral diagnostics of practical diffusion flames. According to OH*, CH*, and C-2* emissions, the effects of different conditions on the flame chemiluminescence and structure characteristics were discussed in this study. The results showed that, with the increase of burner-to-plate distance (L/D-e), the flame changes from envelope shape to conical shape, which affects the reaction region of a flame. The reaction region of an impinging flame could be divided into two parts: the jet core section near the nozzle exit and the impinging section near the flat plate. Due to the change of flow field, the size of the reaction region in impinging section increases first and then decreases with the increase of L/D-e. Moreover, the equivalence ratio [O/C](e) and L/D-e are the two factors influencing the size of the reaction region, and the length of a reaction region can be predicted by these two parameters.
机译：激发态自由基的化学发光信息对于实际扩散火焰的火焰光谱诊断非常重要。根据OH *，CH *和C-2 *的排放，讨论了不同条件对火焰化学发光和结构特征的影响。结果表明，随着燃烧器到平板距离（L / D-e）的增加，火焰从包壳形状变为圆锥形，从而影响火焰的反应区域。撞击火焰的反应区域可分为两部分：靠近喷嘴出口的射流芯部分和靠近平板的撞击部分。由于流场的变化，撞击段反应区的大小先增大，然后随着L / D-e的增大而减小。另外，当量比[O / C]（e）和L / D-e是影响反应区域的大小的两个因素，可以通过这两个参数来预测反应区域的长度。

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  • 来源
    《Combustion Science and Technology》 |2017年第12期|2195-2208|共14页
  • 作者

    Hu Chonghe; Gong Yan; Song Xudong; Guo Qinghua; Yu Guangsuo;

  • 作者单位

    East China Univ Sci & Technol, Engn Res Ctr Coal Gasificat, Key Lab Coal Gasificat & Energy Chem Engn, Minist Educ, Shanghai 200237, Peoples R China;

    East China Univ Sci & Technol, Engn Res Ctr Coal Gasificat, Key Lab Coal Gasificat & Energy Chem Engn, Minist Educ, Shanghai 200237, Peoples R China;

    East China Univ Sci & Technol, Engn Res Ctr Coal Gasificat, Key Lab Coal Gasificat & Energy Chem Engn, Minist Educ, Shanghai 200237, Peoples R China;

    East China Univ Sci & Technol, Engn Res Ctr Coal Gasificat, Key Lab Coal Gasificat & Energy Chem Engn, Minist Educ, Shanghai 200237, Peoples R China;

    East China Univ Sci & Technol, Engn Res Ctr Coal Gasificat, Key Lab Coal Gasificat & Energy Chem Engn, Minist Educ, Shanghai 200237, Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Chemiluminescence; Diffusion flame; Equivalence ratio; Flame structure; Impinging;

    机译：化学发光;扩散火焰;当量比;火焰结构;冲击;

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