| 拉伸对甲烷/空气层流预混火焰影响的数值研究 |
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| 引用本文： | 葛海文,董刚,陈义良.拉伸对甲烷/空气层流预混火焰影响的数值研究[J].中国科学技术大学学报,2003,33(3):369-374. |
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| 作者姓名： | 葛海文 董刚 陈义良 |
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| 作者单位： | 中国科学技术大学热科学和能源工程系,合肥,230027 |
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| 基金项目： | 973课题“燃煤污染防治的基础研究”资助项目 (G19990 2 2 2 0 7) |
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| 摘 要： | 对甲烷/空气对撞拉伸层流预混火焰进行了数值求解,所采用的化学反应机理为GRI_Mech3．0(包含53种物质和325个基元反应),讨论分析了火焰面的拉伸对层流火焰的结构、温度和组分分布的影响．结果显示,火焰面的拉伸降低了火焰的厚度和化学反应速率,高温区域的减小,是一些自由基如N0,0,H等的生成量减少的主要原因;0,H等活性自由基的减少会导致熄火．
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| 关 键 词： | 预混 拉伸火焰 污染物排放 数值模拟 |
| 文章编号： | 0253-2778(2003)03-0369-06 |
Numerical Study on Stretch Effects on Premixed Flame |
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| GE Hai wen,DONG Gang,CHEN Yi liang.Numerical Study on Stretch Effects on Premixed Flame[J].Journal of University of Science and Technology of China,2003,33(3):369-374. |
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| Authors: | GE Hai wen DONG Gang CHEN Yi liang |
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| Abstract: | In this paper, numerical simulation of strained premixed methane-air flame is performed on the case of "Fresh-to-Burnt". A detailed general chemical mechanism GRI_Mech 3.0 , which contains 53 species and 325 elementary reactions, is used. Stretch Effects on the structure of flame, temperature and species distribution are discussed. The result shows that the stretch reduces the thickness of flamelets and the efficiency of chemical reactions, that the productions of the radicals depending on temperature (such as NO,O,H) decrease greatly, and that of active radicals (such as O,H) will effect a quenching of the flames. |
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| Keywords: | premixed stretched flame pollutant emission numerical simulation |
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