微喷管氢气非预混射流火焰燃烧特性

doi:10.11949/j.issn.0438-1157.20160119

化工学报 ›› 2016, Vol. 67 ›› Issue (7): 2724-2731.DOI: 10.11949/j.issn.0438-1157.20160119

微喷管氢气非预混射流火焰燃烧特性

张京^1,2, 李星^1,2, 杨浩林^1,2, 蒋利桥^1,2, 汪小憨^1,2, 赵黛青^1,2

1. 中国科学院广州能源研究所, 广东广州 510640;
2. 中国科学院可再生能源重点实验室, 广东广州 510640

收稿日期:2016-01-27 修回日期:2016-03-09 出版日期:2016-07-05 发布日期:2016-07-05
通讯作者: 李星
基金资助:
国家自然科学基金项目（51336010）；国家重点基础研究发展计划项目（2014CB239600）；广东省国际合作项目（2014A050503054）。

Combustion characteristic of hydrogen non-premixed micro-jet flames

ZHANG Jing^1,2, LI Xing^1,2, YANG Haolin^1,2, JIANG Liqiao^1,2, WANG Xiaohan^1,2, ZHAO Daiqing^1,2

1. Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, Guangdong, China;
2. Key Laboratory of Renewable Energy, Chinese Academy of Sciences, Guangzhou 510640, Guangdong, China

Received:2016-01-27 Revised:2016-03-09 Online:2016-07-05 Published:2016-07-05
Supported by:
supported by the National Natural Science Foundation of China (51336010), the National Basic Research Program of China (2014CB239600) and the International Cooperation Program of Guangdong, China (2014A050503054).

摘要/Abstract

摘要：

采用考虑详细化学反应机理的数值计算，对空气伴流中微圆管氢气非预混射流火焰进行了研究。不同流速下火焰OH基元分布数值计算与实验结果吻合较好。结果表明：当微圆管内径保持不变时，随着燃料速度减小，火焰最高温度逐渐降低。当燃料速度接近熄灭极限速度时，火焰最高温度开始急剧下降；微圆管氢气非预混射流火焰存在最小流速对应的熄灭极限；随着管壁材料热导率降低，火焰中心轴线上的最高温度逐渐升高，喷口处壁面温度也升高；管壁材料热导率对火焰熄灭极限速度影响不显著。

关键词: 微喷管非预混火焰, 氢, 热传导, 熄灭极限, 数值模拟

Abstract:

Non-premixed hydrogen micro-jet flames in co-flow airs were studied by numerical computations with a detailed chemical reaction mechanism. The results of numerical computations agreed reasonably well with the counterparts of the experiments. The results showed that the computed maximum flame temperature decreased with decreasing fuel injection velocity for a fixed micro tube. When the fuel injection velocity was close to the minimum flow velocity sustaining a flame, the computed maximum flame temperature decreased sharply with decreasing fuel velocity. The wall materials had an influence on flame structures at a low fuel velocity. The lower the thermal conductivity of materials, the higher the wall temperature near the nozzle exit. The maximum flame temperature on the axis was relative higher. However, the effect of thermal conductivity on the quenching velocity of flame was not remarkable.

Key words: non-premixed micro-jet-flame, hydrogen, heat conduction, quenching limit, numerical simulation

中图分类号:

TK16

张京, 李星, 杨浩林, 蒋利桥, 汪小憨, 赵黛青. 微喷管氢气非预混射流火焰燃烧特性[J]. 化工学报, 2016, 67(7): 2724-2731.

ZHANG Jing, LI Xing, YANG Haolin, JIANG Liqiao, WANG Xiaohan, ZHAO Daiqing. Combustion characteristic of hydrogen non-premixed micro-jet flames[J]. CIESC Journal, 2016, 67(7): 2724-2731.

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微喷管氢气非预混射流火焰燃烧特性

Combustion characteristic of hydrogen non-premixed micro-jet flames

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