| 压力对可燃极限非单调作用的机理分析 |
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| 引用本文： | 田雪沁,陶志强,张海.压力对可燃极限非单调作用的机理分析[J].工程热物理学报,2011(9):1601-1604. |
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| 作者姓名： | 田雪沁 陶志强 张海 |
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| 作者单位： | 清华大学热能工程系热科学与动力工程教育部重点实验室; |
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| 基金项目： | 国家自然基金资助项目(No.50576041) |
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| 摘 要： | 采用CHEMKIN的PREMIX模块对非常压下贫燃侧的一维、层流CH4／Air预混火焰进行数值模拟，分析了不同的压力下辐射引起的最高火焰温度损失、主要反应的敏感性系数和主要自由基摩尔分数的变化。结果表明，辐射热损失随着当量比的下降而加强，在非单调变化的拐点附近，热辐射损失对最高火焰温度的相对变化作用明显加强。随着压力增...
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| 关 键 词： | 预混火焰 压力 可燃极限 反应机理 |
Mechanism Analyses of Pressure Non-Monotonic Effect on Flammability Limits |
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| TIAN Xue-Qin TAO Zhi-Qiang ZHANG Hai.Mechanism Analyses of Pressure Non-Monotonic Effect on Flammability Limits[J].Journal of Engineering Thermophysics,2011(9):1601-1604. |
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| Authors: | TIAN Xue-Qin TAO Zhi-Qiang ZHANG Hai |
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| Institution: | TIAN Xue-Qin TAO Zhi-Qiang ZHANG Hai (Key Laboratory for Thermal Science and Power Engineering of Ministry of Education,Department of Thermal Engineering,Tsinghua University,Beijing 100084,China) |
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| Abstract: | 1D,laminar premixed CH_4/Air flames at elevated pressures were numerically studied to assess pressure effect on flammability limits,with attention primarily paid to maximum flame temperature loss caused by radiation,dominant chain branching and termination reactions and species profiles at different pressures.It was found that radiation heat loss effect increases with decreasing equivalence ratio,especially at the turning point showing the non-monotonic pressure effect.As pressure increases,sensitivity coef... |
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| Keywords: | premixed flames pressure effect flammability limit mechanism analyses |
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