CO2/N2稀释对H2/CH4层流火焰传播特性的影响

doi:10.12068/j.issn.1005-3026.2020.09.018

东北大学学报:自然科学版 ›› 2020, Vol. 41 ›› Issue (9): 1321-1327.DOI: 10.12068/j.issn.1005-3026.2020.09.018

CO₂/N₂稀释对H₂/CH₄层流火焰传播特性的影响

尚融雪¹，高俊豪^1,2，杨悦¹，李刚¹

(1. 东北大学资源与土木工程学院，辽宁沈阳110819; 2. 中国科学技术大学火灾科学国家重点实验室，安徽合肥230027)

收稿日期:2019-11-28 修回日期:2019-11-28 出版日期:2020-09-15 发布日期:2020-09-15
通讯作者: 尚融雪
作者简介:尚融雪(1987-)，女，辽宁沈阳人，东北大学讲师，博士；李刚(1969-)，男，河南信阳人，东北大学教授，博士生导师.
基金资助:
国家自然科学基金资助项目(51804065); 国家重点研发计划项目(2017YFC0804703); 中国博士后科学基金资助项目(2018M631811); 中央高校基本科研业务费专项资金资助项目(N2001023).

Effect of CO₂/N₂ Dilution on the Propagation of Laminar Flames of H₂/CH₄

SHANG Rong-xue¹， GAO Jun-hao^1,2， YANG Yue¹， LI Gang¹

1. School of Resources & Civil Engineering， Northeastern University， Shenyang 110819， China； 2. State Key Laboratory of Fire Science， University of Science and Technology of China， Hefei 230027， China.

Received:2019-11-28 Revised:2019-11-28 Online:2020-09-15 Published:2020-09-15
Contact: SHANG Rong-xue
About author:-
Supported by:
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摘要/Abstract

摘要： 利用本生灯-纹影系统实验研究含有CO₂，N₂的掺氢天然气层流预混火焰传播速度，并应用GRI-3.0机理模拟计算不同组分预混燃气绝热火焰温度、敏感性系数及重要自由基浓度等，详细讨论CO₂，N₂的稀释效应.研究表明，GRI-3.0机理能较好地预测掺氢天然气层流预混火焰传播速度；CO₂，N₂稀释组分会显著抑制掺氢天然气层流预混火焰速度及其绝热火焰温度；与N₂相比，CO₂不仅具有较强的热力学效应，且随着CO₂稀释比的增加，火焰中重要自由基H浓度显著减少，抑制氧化反应H+O₂O+OH对燃烧的主导促进效应，使预混燃料的层流火焰传播速度显著降低.

关键词: 本生灯, 层流火焰传播速度, CO₂/N₂稀释, 敏感性分析, 重要自由基

Abstract: The transmission speeds of laminar flames of H₂/CH₄/air mixtures with CO₂/N₂ dilution were experimentally studied using the Bunsen burner method incorporating the schlieren technique. To thoroughly investigate the diluted effect of CO₂/N₂ on laminar premixed flames of H₂/CH₄/air mixtures， the adiabatic flame temperatures， sensitivities of the mixtures with various CO₂/N₂ dilution ratios and the mole fractions of vital radicals were calculated using GRI-3.0 mechanism. The research results showed that GRI-3.0 mechanism provided better estimates of the transmission speeds of hythane flames; laminar flame speeds and adiabatic flame temperatures decreased with the growth of CO₂/N₂ dilution ratios. Compared with N₂， CO₂ presented the stronger thermal effect and chemical kinetics effect on the decrease of the laminar flame speeds of diluted hythane. With the increase of CO₂ dilution ratios， the dominant promotion of the oxidation reaction H+O₂O+OH on the mass burning rates of mixtures can be inhibited by the significant reductions of H radicals. Therefore， the laminar flame speed of mixtures remarkable decreased with the growth of CO₂ rations.

Key words: Bunsen burner, laminar flame speed, CO₂/N₂ dilution, sensitivity analysis, vital radical

中图分类号:

TK1211

尚融雪，高俊豪，杨悦，李刚. CO₂/N₂稀释对H₂/CH₄层流火焰传播特性的影响[J]. 东北大学学报:自然科学版, 2020, 41(9): 1321-1327.

SHANG Rong-xue， GAO Jun-hao， YANG Yue， LI Gang. Effect of CO₂/N₂ Dilution on the Propagation of Laminar Flames of H₂/CH₄[J]. Journal of Northeastern University Natural Science, 2020, 41(9): 1321-1327.

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CO₂/N₂稀释对H₂/CH₄层流火焰传播特性的影响

Effect of CO₂/N₂ Dilution on the Propagation of Laminar Flames of H₂/CH₄

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