点火位置对氢气/甲烷/空气预混气体爆燃特性的影响

doi:10.11949/j.issn.0438-1157.20170369

化工学报 ›› 2017, Vol. 68 ›› Issue (12): 4874-4881.DOI: 10.11949/j.issn.0438-1157.20170369

点火位置对氢气/甲烷/空气预混气体爆燃特性的影响

郑立刚^1,3, 苏洋¹, 李刚¹, 王亚磊¹, 朱小超¹, 王燕^1,3, 余明高²

1 瓦斯地质与瓦斯治理国家重点实验室培育基地, 河南焦作 454003;
2 重庆大学煤矿灾害动力学与控制国家重点实验室, 重庆 400044;
3 煤炭安全生产河南省协同创新中心, 河南焦作 454003

收稿日期:2017-04-10 修回日期:2017-08-15 出版日期:2017-12-05 发布日期:2017-12-05
通讯作者: 余明高
基金资助:
国家自然科学基金项目（51674104，51501083）；中国博士后基金项目（2013M540570）；河南省高等学校青年骨干教师资助项目（2012GGJS-053）。

Effect of ignition position on deflagration characteristics of premixed hydrogen/methane/air

ZHENG Ligang^1,3, SU Yang¹, LI Gang¹, WANG Yalei¹, ZHU Xiaochao¹, WANG Yan^1,3, YU Minggao²

1 State Key Laboratory Cultivation Base for Gas Geology and Gas Control, Henan Polytechnic University, Jiaozuo 454003, Henan, China;
2 State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China;
3 The Collaborative Innovation Center of Coal Safety Production of Henan Province, Jiaozuo 454003, Henan, China

Received:2017-04-10 Revised:2017-08-15 Online:2017-12-05 Published:2017-12-05
Supported by:
supported by the National Natural Science Foundation of China (51674104, 51501083).

摘要/Abstract

摘要：

为研究不同点火位置下氢气/甲烷/空气预混气体的爆燃特性，改变点火位置IP和氢气添加比例φ，在100 mm×100 mm×1000 mm方形透明管道实验平台上开展爆燃实验。实验结果表明：火焰结构向泄爆端和封闭端传播时受点火位置和氢气添加比例的控制，当火焰向泄爆端传播时，郁金香火焰的形成因素由IP主导，当火焰向封闭端传播时，IP及φ共同作用于郁金香火焰的形成；IP和φ对火焰前锋演化的作用模式可以分为3类；当混合气体中φ小于0.25时，氢气添加对火焰传播速度的影响不明显；当φ不超过0.75时，仅当IP位于管道中后部时，超压出现周期性振荡，且点火位置距泄爆端越近，振荡时间越长；当为纯氢爆炸时，不同点火位置下压力振荡消失且到达最大压力峰值的时间基本一致；当φ不同时，最大压力峰值随点火位置的变化规律不同。

关键词: 氢气, 点火位置, 甲烷/空气, 爆炸, 安全

Abstract:

In order to investigate the effect of the ignition position on deflagration characteristics of premixed methane/air mixture with hydrogen addition, an experimental study was conducted in a transparent pipe with the cross-section of 100 mm×100 mm and the length of 1000 mm with the variation of ignition position (IP) and hydrogen addition ratio (φ). The results indicated that the changing of the flame structures was dependent on both IP and φ when the flames propagated to the vent and the closed end. The formation of the tulip flame was mainly affected by IP when the flame propagated to the vent. Whereas, it was influenced by both IP and φ when the flame propagated to the closed end. The evolution of the flame front could be divided into three categories according to IP and φ. Hydrogen addition had no obvious effects on the flame propagation velocity when φ was less than 0.25. When φ was less than 0.75, the overpressure presented periodic oscillation only under the conditions that the ignition position was in the middle or the rear of the pipe. Moreover, the closer the ignition position was to the vent, the longer the oscillation time would be. With regard to the pure hydrogen explosion, the pressure oscillation disappeared and the arrival time of the maximum peak pressure was basically the same for all ignition positions. The changing trends of the maximum peak pressure with the ignition position were different for various hydrogen addition ratios.

Key words: hydrogen, ignition position, methane/air, explosion, safety

中图分类号:

TD712

郑立刚, 苏洋, 李刚, 王亚磊, 朱小超, 王燕, 余明高. 点火位置对氢气/甲烷/空气预混气体爆燃特性的影响[J]. 化工学报, 2017, 68(12): 4874-4881.

ZHENG Ligang, SU Yang, LI Gang, WANG Yalei, ZHU Xiaochao, WANG Yan, YU Minggao. Effect of ignition position on deflagration characteristics of premixed hydrogen/methane/air[J]. CIESC Journal, 2017, 68(12): 4874-4881.

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点火位置对氢气/甲烷/空气预混气体爆燃特性的影响

Effect of ignition position on deflagration characteristics of premixed hydrogen/methane/air

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