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Experimental study on premixed CH_4/air mixture combustion in micro Swiss-roll combustors

机译：微型Swiss-Roll燃烧器中预混合CH_4 /空气混合物燃烧的实验研究

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摘要

Excess enthalpy combustion is a promising approach to stabilize flame in micro-combustors. Using a Swiss-roll combustor configuration, excess enthalpy combustion can be conveniently achieved. In this work, three types of Swiss-roll combustors with double spiral-shaped channels were designed and fabricated. The combustors were tested using methane/air mixtures of various equivalence ratios. Both temperature distributions and extinction limits were determined for each combustor configuration at different methane mass flow rates. Results indicate that the Swiss-roll combustors developed in the current study greatly enhance combustion stability in center regions of the combustors. At the same time, excess enthalpy combustors of the Swiss-roll configuration significantly extend the extinction limits of methane/air mixtures. In addition, the effects of combustor configurations and thermal insulation arrangements on temperature distributions and extinction limits were evaluated. With heat losses to the environment being significant, the use of thermal insulations further enhances the flame stability in center regions of the Swiss-roll combustors and extends flammable ranges.
机译：过量的焓燃烧是稳定微型燃烧器火焰的一种有前途的方法。使用Swiss-Roll燃烧器配置，可以方便地实现过量的焓燃烧。在这项工作中，设计和制造了三种具有双螺旋形通道的Swiss-Roll燃烧器。使用各种当量比的甲烷/空气混合物测试燃烧室。在不同的甲烷质量流量下，确定每种燃烧器配置的温度分布和消光极限。结果表明，本研究开发的瑞士卷燃烧器大大增强了燃烧器中心区域的燃烧稳定性。同时，过剩的瑞士卷式焓燃烧器大大延长了甲烷/空气混合物的消光极限。此外，还评估了燃烧室配置和隔热布置对温度分布和消光极限的影响。由于对环境的热损失非常大，因此使用绝热材料可以进一步提高Swiss-Roll燃烧器中心区域的火焰稳定性，并扩展可燃范围。

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  • 来源
    《Combustion and Flame》 |2010年第12期|p.2222-2229|共8页
  • 作者

    Zhong Bei-Jing; rnWang Jian-Hua;

  • 作者单位

    Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Engineering Mechanics, Tsinghua University, Beijing 100084, PR China;

    rnKey Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Engineering Mechanics, Tsinghua University, Beijing 100084, PR 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

    swiss-roll combustor; CH_4 premixed combustion; extinction limits;

    机译：瑞士卷燃烧室;CH_4预混燃烧;灭绝极限;

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