甲烷-空气最小点火能量预测理论模型

马秋菊; 张奇; 庞磊

doi:10.11858/gywlxb.2012.03.009

甲烷-空气最小点火能量预测理论模型

doi: 10.11858/gywlxb.2012.03.009

马秋菊¹,
张奇^1, ,,
庞磊²

1.
北京理工大学爆炸科学与技术国家重点实验室，北京 100081；
2.
北京市劳动保护科学研究所，北京 100081

详细信息

通讯作者:
张奇 qzhang@bit.edu.cn

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出版历程
- 收稿日期: 2011-12-05
- 修回日期: 2011-11-21
- 发布日期: 2012-06-15

Theoretical Model of Minimum Ignition Energy Prediction for Methane-Air Mixture

MA Qiu-Ju¹,
ZHANG Qi^{1
, ,},
PANG Lei²

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

摘要

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。
- 气体爆炸 /
- 最小点火能 /
- 临界温度 /
- 点火 /
- 热点
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.
- gas explosion /
- minimum ignition energy /
- critical temperature /
- ignition /
- hot spot

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参考文献(11)

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