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Numerical study on laminar burning velocity and ignition delay time of ammonia flame with hydrogen addition
Li, Jun1; Huang, Hongyu2,3; Kobayashi, Noriyuki1; Wang, Chenguang2,3; Yuan, Haoran2,3
2017-05-01
Source PublicationENERGY
Volume126Pages:796-809
AbstractThis study focuses on the application of NH3 as a carbon-free alternative fuel in internal combustion devices. The two key parameters for fuel combustion, namely, laminar burning velocity and ignition delay time of the NH3 flame at various H-2 blending levels, are numerically investigated. Results show that the selected modified Dagaut-Keromnes mechanism is acceptable and repeatable for calculating the burning velocity and ignition delay time of NH3-air flame at various H-2 addition conditions. H-2 addition increases the reactivity of NH3 combustion at all conditions and enhances the burning velocity. This enhancement is mainly due to chemical effect caused by the reduction in chemical activation energy and the transport effect resulting from the high mobility of H-2. Furthermore, an increase in pressure and H-2 addition ratios can significantly decrease the ignition delay time of NH3 mixtures and promote NH3 ignition. The enhancement of H-2 addition on NH3 ignition and laminar burning velocity is mainly attributed to the contribution of the three following reactions: O + H-2 = OH + H, H + O-2 = OH + O, and H-2 + OH = H2O + H. These reactions can significantly increase the concentration of free radicals and accelerate the peak of radicals. (C) 2017 Elsevier Ltd. All rights reserved.
SubtypeArticle
KeywordLaminar Burning Velocity Ignition Delay Time Ammonia Flame Hydrogen Addition
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
DOI10.1016/j.energy.2017.03.085
WOS Subject ExtendedThermodynamics ; Energy & Fuels
WOS KeywordPERFORMANCE-CHARACTERISTICS ; COMBUSTION CHARACTERISTICS ; FLAMMABILITY LIMITS ; ELEVATED PRESSURES ; TEMPERATURE ; OXIDATION ; MIXTURES ; ENGINE ; AIR ; CHEMISTRY
Indexed BySCI
Language英语
WOS SubjectThermodynamics ; Energy & Fuels
WOS IDWOS:000404305900062
Citation statistics
Cited Times:12[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.giec.ac.cn/handle/344007/14154
Collection中国科学院广州能源研究所
Affiliation1.Nagoya Univ, Dept Chem Engn, Nagoya, Aichi 4648603, Japan
2.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Guangdong, Peoples R China
3.Guangdong Key Lab New & Renewable Energy Res & De, Guangzhou 510640, Guangdong, Peoples R China
Recommended Citation
GB/T 7714
Li, Jun,Huang, Hongyu,Kobayashi, Noriyuki,et al. Numerical study on laminar burning velocity and ignition delay time of ammonia flame with hydrogen addition[J]. ENERGY,2017,126:796-809.
APA Li, Jun,Huang, Hongyu,Kobayashi, Noriyuki,Wang, Chenguang,&Yuan, Haoran.(2017).Numerical study on laminar burning velocity and ignition delay time of ammonia flame with hydrogen addition.ENERGY,126,796-809.
MLA Li, Jun,et al."Numerical study on laminar burning velocity and ignition delay time of ammonia flame with hydrogen addition".ENERGY 126(2017):796-809.
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