| 开口钢管内甲烷爆炸火焰厚度和压力发展特征 |
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| 引用本文： | 江丙友,,刘泽功,林柏泉.开口钢管内甲烷爆炸火焰厚度和压力发展特征[J].中国安全生产科学技术,2015,11(9):5-10. |
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| 作者姓名： | 江丙友 刘泽功 林柏泉 |
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| 作者单位： | （1. 安徽理工大学 能源与安全学院，安徽 淮南 232001；2. 中国矿业大学<北京>煤炭资源与安全开采国家重点实验室，
北京 100083；3. 中国矿业大学 安全工程学院，江苏 徐州 221116） |
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| 摘 要： | 通过搭建长为20m、截面为0.08m×0.08m的非绝热开口钢管，研究了甲烷与空气预混气体发生爆炸后的火焰和压力发展特征。实验结果表明:火焰信号最强的时刻对应于火焰前锋反应区内某时刻，而火焰信号起始上升时刻与火焰前锋预热区起始时刻接近，应选择某点火焰信号起始上升时刻作为该点的火焰到达时间。随着远离点火源距离的增加，火焰厚度呈现先变薄后变厚的变化趋势，最大超压呈现先减小、后增大、再减小的趋势，火焰传播速度则呈先增大后减小的变化过程。非绝热开口钢管的实验条件对爆炸超压和火焰传播速度的影响较大。研究成果可为甲烷爆炸致灾机制及防控的研究提供参考。
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| 关 键 词： | 非绝热条件 开口管道 甲烷爆炸 火焰厚度 |
Flame thickness and pressure development characteristics of methane explosion in an open steel pipe |
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| JIANG Bing-you,' target="_blank" rel="external">,LIU Ze-gong,LIN Bai-quan.Flame thickness and pressure development characteristics of methane explosion in an open steel pipe[J].Journal of Safety Science and Technology,2015,11(9):5-10. |
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| Authors: | JIANG Bing-you " target="_blank">' target="_blank" rel="external"> LIU Ze-gong LIN Bai-quan |
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| Affiliation: | (1. School of Mining and Safety Engineering, Anhui University of Science & Technology, Huainan Anhui 232001, China;
2. State Key Laboratory of Coal Resources and Safe Mining, China University of Mining & Technology (Beijing), Beijing
100083, China; 3. S |
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| Abstract: | Through establishing a non-adiabatic open pipe with a length of 20 m and a cross-sectional area of 0.08 m × 0.08 m, the flame and pressure development characteristics of premixed methane/air explosion were investigated experimentally. The results showed that the time of obtaining maximum flame signal value is corresponding to a certain time of flame-front reaction zone, while the time when the flame signal begins to rise is almost the same as that when the flame-front preheat zone starts. Thus, the time when the flame signal begins to rise at a certain point can be defined as the flame arrival time at this point. With increasing distance away from the ignition source, the flame thickness presents a changing trend of decreasing first and increasing after, and the maximum overpressure follows a trend of decreasing, increasing and decreasing, while the flame propagation speed shows a changing process of increasing and decreasing. The experimental conditions of non-adiabatic open steel pipe have an obvious effect on the explosion overpressure and flame propagation speed. The results can provide a reference for the further research on the disaster mechanism and control of methane explosion. |
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| Keywords: | non-adiabatic condition open pipe methane explosion flame thickness |
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