| 燃料与自由基的Lewis数对预混气体点火的影响 |
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| 引用本文： | 张黄伟,陈正. 燃料与自由基的Lewis数对预混气体点火的影响[J]. 工程热物理学报, 2011, 0(7) |
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| 作者姓名： | 张黄伟 陈正 |
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| 作者单位： | 北京大学工学院湍流与复杂系统国家重点实验室; |
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| 基金项目： | 国家自然科学基金资助项目(No.50976003); 天津大学内燃机国家重点实验室开放课题(No.K2010-02) |
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| 摘 要： | 通过渐近理论分析研究了燃料与自由基的Lewis数对预混气体点火的影响。采用包含自由基的两步化学反应,基于火焰球模型,推导出了描述火焰球半径随点火能以及燃料与自由基的Lewis数而变化的关系式。并在此基础上发现不同参数条件下成功点火的三种情况,研究了燃料与自由基的Lewis数对最小点火能的影响。研究结果表明:随着燃料Lewis数的增大,最小点火能增大;随着自由基Lewis数的增大,最小点火能减小。
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| 关 键 词： | 两步化学反应 Lewis数 最小点火能 |
Effects of Lewis Numbers of Fuel and Radical on the Ignition of Premixed Gases |
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| ZHANG Huang-Wei CHEN Zheng. Effects of Lewis Numbers of Fuel and Radical on the Ignition of Premixed Gases[J]. Journal of Engineering Thermophysics, 2011, 0(7) |
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| Authors: | ZHANG Huang-Wei CHEN Zheng |
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| Affiliation: | ZHANG Huang-Wei CHEN Zheng (State Key Laboratory for Turbulence and Complex Systems,College of Engineering,Peking University,Beijing 100871,China) |
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| Abstract: | Asymptotic theoretical analysis is conducted to investigate the effects of Lewis numbers of fuel and radical on the ignition of premixed gases.Considering the two-step chemistry with radical kinetics,we derived the correlation depicting the change of flame ball radius with ignition power as well as the Lewis numbers of fuel and radical based on the model of stationary flame ball.With the help of this correlation,three different cases of successful ignition are found and the effects of fuel and radical Lewis... |
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| Keywords: | two-step chemistry Lewis number minimum ignition energy |
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