Effects of diluents on the ignition of premixed H-2/air mixtures
文献类型：期刊论文
| 作者 | Zhang, Weikuo1; Chen, Zheng1; Kong, Wenjun2 |
| 刊名 | COMBUSTION AND FLAME
 |
| 出版日期 | 2012 |
| 卷号 | 159期号:1页码:151-160 |
| 关键词 | Ignition H-2/air/diluent Minimum ignition energy Dilution limit |
| 英文摘要 | A computational study is performed to investigate the effects of diluents on the ignition of premixed H-2/air mixtures. The ignition processes for fuel lean, stoichiometric, and fuel rich H-2/air mixed with different diluents (He, Ar, N-2, and CO2) are simulated with detailed chemistry and variable thermodynamic and transport properties. The minimum ignition energies (MIE) for different diluents at different dilution ratios are obtained. It is found that the change of the MIE with the dilution ratio consists of two regimes: in the first regime with a small value of dilution ratio, diluent addition has little effect on the MIE and in the second regime with dilution ratio above a certain value, the MIE increases exponentially with the dilution ratio. The kinetic and radiation effects of dilution are assessed by conducting sensitivity analysis and using the optically thin model, respectively. The thermal and flame-dynamic effect of dilution, characterized by the adiabatic flame temperature and Markstein length, respectively, are also discussed. Moreover, the dilution limits for H-2/air mixtures at different equivalence ratios are obtained. The dilution limits predicted by present ignition calculation are found to agree well with those based on laminar flame speed measurements at micro-gravity conditions. The ranking in terms of the effectiveness on ignition inhibition for stoichiometric H-2/air is shown to be in the order of Ar, N-2, He, and CO2. the dilution limit is of practical interest since it is a measure of the efficiency of the diluent in fire prevention and suppression. (C) 2011 The Combustion Institute. Published by Elsevier Inc. All rights reserved. |
| WOS标题词 | Science & Technology ; Physical Sciences ; Technology |
| 类目[WOS] | Thermodynamics ; Energy & Fuels ; Engineering, Multidisciplinary ; Engineering, Chemical ; Engineering, Mechanical |
| 研究领域[WOS] | Thermodynamics ; Energy & Fuels ; Engineering |
| 关键词[WOS] | LAMINAR BURNING VELOCITIES ; PROPAGATING SPHERICAL FLAMES ; PROPANE-AIR MIXTURES ; KINETIC MECHANISM ; LEWIS NUMBER ; HYDROGEN COMBUSTION ; ELEVATED PRESSURES ; METHANE/AIR FLAMES ; FLAMMABILITY LIMIT ; MARKSTEIN LENGTHS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000298071400014 |
| 源URL | [http://ir.etp.ac.cn/handle/311046/101523]  |
| 专题 | 工程热物理研究所_中国科学院工程热物理所（论文库）_期刊论文（SCI） |
| 作者单位 | 1.Peking Univ, Coll Engn, Dept Mech & Aerosp Engn, SKLTCS, Beijing 100871, Peoples R China 2.Chinese Acad Sci, Inst Engn Thermophys, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Weikuo,Chen, Zheng,Kong, Wenjun. Effects of diluents on the ignition of premixed H-2/air mixtures[J]. COMBUSTION AND FLAME,2012,159(1):151-160. |
| APA | Zhang, Weikuo,Chen, Zheng,&Kong, Wenjun.(2012).Effects of diluents on the ignition of premixed H-2/air mixtures.COMBUSTION AND FLAME,159(1),151-160. |
| MLA | Zhang, Weikuo,et al."Effects of diluents on the ignition of premixed H-2/air mixtures".COMBUSTION AND FLAME 159.1(2012):151-160. |
入库方式： OAI收割
来源：工程热物理研究所
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