东北大学学报(自然科学版) ›› 2025, Vol. 46 ›› Issue (6): 147-154.DOI: 10.12068/j.issn.1005-3026.2025.20230330

• 资源与土木工程 • 上一篇    

O2/CO2气氛下CH4/H2/空气层流预混火焰传播特性

尚融雪, 孙浩英, 孙奇琪, 谭鑫悦   

  1. 东北大学 资源与土木工程学院,辽宁 沈阳 110819
  • 收稿日期:2023-12-14 出版日期:2025-06-15 发布日期:2025-09-01
  • 作者简介:尚融雪(1987—),女,辽宁沈阳人,东北大学副教授.
  • 基金资助:
    国家自然科学基金资助项目(51804065);中国博士后科学基金资助项目(2018M631811)

Flame Propagation Characteristics of CH4/H2/Air Laminar Flow Premix Under O2/CO2 Atmosphere

Rong-xue SHANG, Hao-ying SUN, Qi-qi SUN, Xin-yue TAN   

  1. School of Resources & Civil Engineering,Northeastern University,Shenyang 110819,China. Corresponding author: SHANG Rong-xue,E-mail: rongxue. shang@foxmail. com
  • Received:2023-12-14 Online:2025-06-15 Published:2025-09-01

摘要:

利用本生灯-纹影实验系统及Premix模型,系统研究了O2/CO2气氛下不同掺氢比掺氢燃气层流预混火焰传播特性.研究发现,GRI3.0机理能较准确预测高含氧量及高掺氢比下掺氢燃气层流火焰传播速度;在O2/CO2气氛下,掺氢燃气的层流火焰传播速度随着掺氢比的增加显著加快,且速度峰值向富燃侧移动;同时,预混燃气的绝热火焰温度及层流火焰传播速度随含氧量增加而逐渐升高;随着含氧量增加,火焰中大量存在的H自由基能够促进氧化反应H+O2=O+OH的进程,进而提高了预混燃气层流火焰传播速度.

关键词: 层流火焰, 富氧燃烧技术, 含氧量, 化学动力学, 掺氢比

Abstract:

The laminar premixed flame propagation characteristics of hydrogen-enriched gas with different hydrogen mixing ratios in an O₂/CO₂ atmosphere were systematically studied using a Bunsen burner-schlieren experimental system and the Premix model. The results show that GRI3.0 mechanism can provide accurate predictions of the laminar flame propagation velocity of mixtures under high hydrogen mixing ratios and high O2 concentrations atmosphere. With the increase of hydrogen mixing ratios, the laminar flame propagation velocity of mixtures increase significantly at O2/CO2 atmosphere. The peak values of laminar flame propagation velocity slightly shift to the fuel-rich side. Meanwhile, the adiabatic flame temperature and laminar flame propagation velocity of mixtures gradually increase as the O2 concentration increases. With the increase of O2 concentrations, the large number of H radicals enhance the dominant promotion of H+O2=O+OH, which contributes to the increase of the laminar flame propagation velocity of mixtures.

Key words: laminar flame, oxygen-rich combustion technology, O2 concentration, chemical kinetics, hydrogen mixing ratios

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