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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
Source PublicationINTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume39Issue:21Pages:11308-11315
AbstractWe 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.
SubtypeArticle
KeywordMicro-combustion Wall Cavity Flame Splitting Reaction Zone Flow Acceleration Boundary Layer
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
DOI10.1016/j.ijhydene.2014.05.113
WOS Subject ExtendedChemistry ; Electrochemistry ; Energy & Fuels
WOS KeywordCOMBUSTION CHARACTERISTICS ; MICRO-COMBUSTOR ; BLUFF-BODY ; HYDROGEN/AIR FLAME ; STABILIZATION ; GENERATION ; DYNAMICS ; FLOWS ; DUCTS
Indexed BySCI
Language英语
WOS SubjectChemistry, Physical ; Electrochemistry ; Energy & Fuels
WOS IDWOS:000339039500052
Citation statistics
Cited Times:16[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.giec.ac.cn/handle/344007/10694
Collection中国科学院广州能源研究所
Affiliation1.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
Recommended Citation
GB/T 7714
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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