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The impact of channel gap distance on flame splitting limit of H-2/air mixture in microchannels with wall cavities
Wan, Jianlong1; Fan, Aiwu1; Yao, Hong1; Liu, Wei1; Gou, Xiaolong2; Zhao, Daiqing3
2014-07-15
发表期刊INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷号39期号:21页码:11308-11315
摘要We recently confirmed the "tip open phenomenon" of lean H-2/air flame in a microchannel with cavities. The critical inlet velocity when fuel conversion ratio drops to 80% was defined as "flame splitting limit". In the present work, we numerically studied the impact of channel gap distance. Results showed that corresponding limits for 1.0-mm, 0.8-mm and 0.6-mm channels are 26 m/s, 33 m/s and 16 m/s respectively, exhibiting a non-monotonic dependence. The analysis reveals that when the gap distance is decreased from 1.0 mm to 0.8 mm, the proportion of fuel that involved into the cavities is increased, flame length is reduced simultaneously, and better preheating of the fresh mixture is attained. These positive effects lead to an increase in flame splitting limit. As the gap distance is further reduced to 0.6 mm, the excessive stretch effect results in complete extinction of downstream flame, causing a decrease of the splitting limit. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
文章类型Article
关键词Micro-combustion Wall Cavity Flame Splitting Reaction Zone Flow Acceleration Boundary Layer
WOS标题词Science & Technology ; Physical Sciences ; Technology
DOI10.1016/j.ijhydene.2014.05.113
研究领域[WOS]Chemistry ; Electrochemistry ; Energy & Fuels
关键词[WOS]COMBUSTION CHARACTERISTICS ; MICRO-COMBUSTOR ; BLUFF-BODY ; HYDROGEN/AIR FLAME ; STABILIZATION ; GENERATION ; DYNAMICS ; FLOWS ; DUCTS
收录类别SCI
语种英语
WOS类目Chemistry, Physical ; Electrochemistry ; Energy & Fuels
WOS记录号WOS:000339039500052
引用统计
被引频次:15[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.giec.ac.cn/handle/344007/10694
专题中国科学院广州能源研究所
作者单位1.Huazhong Univ Sci & Technol, State Key Lab Coal Combust, Wuhan 430074, Peoples R China
2.Chongqing Univ, Sch Power Engn, Chongqing 400044, Peoples R China
3.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Guangdong, Peoples R China
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Wan, Jianlong,Fan, Aiwu,Yao, Hong,et al. The impact of channel gap distance on flame splitting limit of H-2/air mixture in microchannels with wall cavities[J]. INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,2014,39(21):11308-11315.
APA Wan, Jianlong,Fan, Aiwu,Yao, Hong,Liu, Wei,Gou, Xiaolong,&Zhao, Daiqing.(2014).The impact of channel gap distance on flame splitting limit of H-2/air mixture in microchannels with wall cavities.INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,39(21),11308-11315.
MLA Wan, Jianlong,et al."The impact of channel gap distance on flame splitting limit of H-2/air mixture in microchannels with wall cavities".INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 39.21(2014):11308-11315.
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