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Numerical study of the geometrical parameters on CH4/air premixed combustion in heat recirculation micro-combustor

机译：热循环微燃烧器CH4 /空气预混燃烧几何参数的数值研究

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摘要

This paper researches on premixed combustion of a methane/air mixture in a heat recuperation micro-combustor with corundum material, in terms of combustion characteristics of CH4/air in micro channel with Rh catalyst. 3D model is used with the detailed surface elementary reaction mechanism, and analyzes the influence of the baffle length, baffle angle theta, inlet temperature and inlet velocity on the methane conversion rate and heat transfer effect in heat recuperation micro-combustor with plate structure. The results show that an increase of baffle length can increase methane conversion rate and average temperature of burner, but it reduces methane conversion speed, and the maximum value of methane conversion speed is found to shift toward the entrance of reaction zone. It is obvious that theta = 2 degrees can increase the area of high temperature distribution zone, meanwhile, the temperature distribution becomes more and more uniform, but the maximum value of temperature is lower than the others in any one inlet temperature conditions, and the value is merely 1350 K. The research indicates that the baffle angle theta of burner can significantly influence the distribution of flow velocity field, and further effect on the distribution of temperature field. (C) 2015 Elsevier Ltd. All rights reserved.
机译：本文研究了在带有刚玉材料的换热微燃烧器中甲烷/空气混合物的预混燃烧，并在含Rh催化剂的微通道中CH4 /空气的燃烧特性方面进行了研究。采用3D模型，结合详细的表面元素反应机理，分析了挡板长度，挡板角θ，进气温度和进气速度对板式换热器中甲烷转化率和传热效果的影响。结果表明，增加挡板长度可以提高甲烷转化率和燃烧器的平均温度，但降低了甲烷转化速度，发现甲烷转化速度的最大值向反应区入口移动。显然，θ= 2度可以增加高温分布区的面积，同时，温度分布越来越均匀，但是在任何一个入口温度条件下，温度的最大值都低于其他值，并且仅1350K。研究表明，燃烧器的折流角θ可以显着影响流速场的分布，并进一步影响温度场的分布。 （C）2015 Elsevier Ltd.保留所有权利。

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  • 来源
    《Fuel》 |2015年第1期|45-51|共7页
  • 作者

    Yan Yunfei; Pan Wenli; Zhang Li; Tang Weimin; Chen Yanrong; Li Lixian;

  • 作者单位

    Chongqing Univ, Minist Educ, Key Lab Low Grade Energy Utilizat Technol & Syst, Chongqing 400030, Peoples R China;

    Chongqing Univ, Minist Educ, Key Lab Low Grade Energy Utilizat Technol & Syst, Chongqing 400030, Peoples R China;

    Chongqing Univ, Minist Educ, Key Lab Low Grade Energy Utilizat Technol & Syst, Chongqing 400030, Peoples R China;

    Chongqing Univ, Minist Educ, Key Lab Low Grade Energy Utilizat Technol & Syst, Chongqing 400030, Peoples R China;

    Chongqing Univ, Minist Educ, Key Lab Low Grade Energy Utilizat Technol & Syst, Chongqing 400030, Peoples R China;

    Chongqing Canc Hosp & Inst & Canc Ctr, Chongqing 400030, Peoples R China;

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

    Catalytic combustion; Heat recirculation; Geometrical parameters; Methane conversion speed;

    机译：催化燃烧;热循环;几何参数;甲烷转化速度;

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