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首页> 外文期刊>International journal of hydrogen energy >Experimental and numerical investigation on combustion characteristics of premixed hydrogen/air flame in a micro-combustor with a bluff body
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Experimental and numerical investigation on combustion characteristics of premixed hydrogen/air flame in a micro-combustor with a bluff body

机译：预燃氢/空气火焰在钝体微燃烧器中燃烧特性的实验和数值研究

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摘要

Combustion characteristics of lean hydrogen/air mixture in a planar micro-channel with a bluff body were investigated experimentally and numerically. Effects of the inlet velocity and equivalence ratio on the blow-off limit, combustion efficiency and exhaust gas temperature were examined. The results show that the blow-off limit is greatly extended as compared with that of the micro-combustor without a bluff body. Moreover, the blow-off limit increases as the equivalence ratio is increased from 0.4 to 0.6. Furthermore, with the increase of inlet velocity, the flame front is prolonged and becomes narrower, and the high temperature segment of outer wall shifts downstream. In addition, the combustion efficiency and exhaust gas temperature increase first and then decrease with the increase of the inlet velocity. Finally, comparatively high combustion efficiency can be maintained over the whole combustible velocity range at a moderate equivalence ratio.
机译：实验和数值研究了贫油氢气/空气混合物在具有钝体的平面微通道中的燃烧特性。研究了进气速度和当量比对吹气极限，燃烧效率和废气温度的影响。结果表明，与不具有钝体的微型燃烧器相比，吹气极限大大延长。而且，当量比从0.4增加到0.6时，放气极限增加。此外，随着入口速度的增加，火焰前沿延长并变窄，外壁的高温段向下游移动。另外，燃烧效率和废气温度随着进气速度的增加先升高然后降低。最后，可以在整个可燃速度范围内以适当的当量比保持较高的燃烧效率。

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  • 来源
    《International journal of hydrogen energy》 |2012年第24期|19190-19197|共8页
  • 作者

    Jianlong Wan; Aiwu Fan; Kaoru Maruta; Hong Yao; Wei Liu;

  • 作者单位

    State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, China;

    State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, China;

    Institute of Fluid Science, Tohoku University, Sendai 980-8577, Japan;

    State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, China;

    State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    micro-combustor; bluff body; blow-off limit; exhaust gas temperature; combustion efficiency;

    机译：微型燃烧器虚张声势的身体放空极限废气温度燃烧效率;

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