| 甲烷-空气最小点火能量预测理论模型 |
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| 引用本文： | 马秋菊,张奇,庞磊. 甲烷-空气最小点火能量预测理论模型[J]. 高压物理学报, 2012, 26(3): 301-305 |
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| 作者姓名： | 马秋菊 张奇 庞磊 |
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| 作者单位： | 北京理工大学爆炸科学与技术国家重点实验室;北京市劳动保护科学研究所 |
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| 基金项目： | 国家自然科学基金(11072035);博士点科学基金(20101101110005) |
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| 摘 要： | 最小点火能是可燃气体危险性辨识的重要参数之一。为从理论上得到混合气体的最小点火能，建立了可燃气体火花点火的物理模型，给出了通过数值模拟得到的可燃气体最小点火能量的预测方法，采用该方法得到了甲烷-空气混合气火花点火的临界温度及最小点火能量。结果表明：甲烷-空气混合气的最小点火能量与浓度呈U型关系，浓度为8.5%的预混气的最小点火能量计算值为0.39 mJ，与实验值0.4 mJ吻合较好。
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| 关 键 词： | 气体爆炸 最小点火能 临界温度 点火 热点 |
Theoretical Model of Minimum Ignition Energy Prediction for Methane-Air Mixture |
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| MA Qiu-Ju,ZHANG Qi,PANG Lei. Theoretical Model of Minimum Ignition Energy Prediction for Methane-Air Mixture[J]. Chinese Journal of High Pressure Physics, 2012, 26(3): 301-305 |
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| Authors: | MA Qiu-Ju ZHANG Qi PANG Lei |
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| Affiliation: | 1.State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology,Beijing 100081,China; 2.Beijing Municipal Institute of Labor Protection,Beijing 100054,China) |
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| Abstract: | The minimum ignition energy is one of the important properties to estimate the fatalness of combustible gases.To get a theoretical value of minimum ignition,a physical model of spark ignition of the combustible gases was established,and a minimum ignition energy prediction method of combustible mixtures through a numerical analysis was given.The critical temperature and minimum ignition energy of methane-air mixture during spark ignition process were obtained.The results shows that MIE of methane-air has a U-shaped relationship to concentrations,and the MIE of premixed gas under concentration of 8.5% is 0.39 mJ,which agrees well with the experimental value. |
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| Keywords: | gas explosion minimum ignition energy critical temperature ignition hot spot |
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