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A numerical investigation on combustion characteristics of H-2/air mixture in a microcombustor with wall cavities
Wan, Jianlong1; Yang, Wei1; Fan, Aiwu1; Liu, Yi1; Yao, Hong1; Liu, Wei1; Du, Yiqing1; Zhao, Daiqing2
2014-05-15
Source PublicationINTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume39Issue:15Pages:8138-8146
AbstractCombustion characteristics of H-2/air mixture in a micro-combustor with wall cavities were investigated numerically. The effects of inlet velocity, equivalence ratio, and the length-depth ratio of the cavity were studied. The results show that at a high enough velocity the flame splits in the middle which leads to a large amount of fuel leakage and a sharp decrease in the conversion rate of hydrogen. Meanwhile, the flame splits at the inner wall which gives rise to two high temperature regions and double temperature peaks at outer wall. Moreover, the flame-splitting limit is extended at a higher equivalence ratio due to a more intensive reaction. Furthermore, the flame-splitting limit increases for a larger length-depth ratio of the cavity, whereas the wall temperature level decreases. Therefore, excessive large length-depth. ratios are not beneficial for this type of micro-combustors if the combustor walls are used as heat sources of thermoelectric or thermal photovoltaic devices. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
SubtypeArticle
KeywordMicro Combustion Cavity Length-depth Ratio Flame-splitting Limit Recirculation Zone
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
DOI10.1016/j.ijhydene.2014.03.116
WOS Subject ExtendedChemistry ; Electrochemistry ; Energy & Fuels
WOS KeywordMICRO-COMBUSTOR ; FLAME STABILIZATION ; BLUFF-BODY ; HYDROGEN/AIR FLAME ; HIGH-TEMPERATURE ; AIR ; DYNAMICS ; CHANNEL ; MICROCHANNELS ; SIMULATION
Indexed BySCI
Language英语
WOS SubjectChemistry, Physical ; Electrochemistry ; Energy & Fuels
WOS IDWOS:000336338500056
Citation statistics
Cited Times:47[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.giec.ac.cn/handle/344007/10701
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.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Guangdong, Peoples R China
Recommended Citation
GB/T 7714
Wan, Jianlong,Yang, Wei,Fan, Aiwu,et al. A numerical investigation on combustion characteristics of H-2/air mixture in a microcombustor with wall cavities[J]. INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,2014,39(15):8138-8146.
APA Wan, Jianlong.,Yang, Wei.,Fan, Aiwu.,Liu, Yi.,Yao, Hong.,...&Zhao, Daiqing.(2014).A numerical investigation on combustion characteristics of H-2/air mixture in a microcombustor with wall cavities.INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,39(15),8138-8146.
MLA Wan, Jianlong,et al."A numerical investigation on combustion characteristics of H-2/air mixture in a microcombustor with wall cavities".INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 39.15(2014):8138-8146.
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