浓度和点火位置对氢气-空气预混气爆燃特性影响

doi:10.11949/j.issn.0438-1157.20180726

化工学报 ›› 2019, Vol. 70 ›› Issue (1): 408-416.DOI: 10.11949/j.issn.0438-1157.20180726

浓度和点火位置对氢气-空气预混气爆燃特性影响

郑立刚^1,²(),朱小超²,于水军^1,²,王亚磊²,李刚²,杜德朋²,窦增果²,苏洋²

1. 煤炭安全生产河南省协同创新中心，河南焦作 454003
2. 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

收稿日期:2018-07-26 修回日期:2018-10-28 出版日期:2019-01-05 发布日期:2019-01-05
通讯作者: 郑立刚
作者简介:郑立刚（1979—），男，博士，副教授，<email>zhengligang97@163.com</email>
基金资助:
国家自然科学基金项目(51674104，51874120);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);河南理工大学创新型科研团队项目(T2018-2)

Effect of concentration and ignition position on characteristics of premixed hydrogen-air deflagration

Ligang ZHENG^1,²(),Xiaochao ZHU²,Shuijun YU^1,²,Yalei WANG²,Gang LI²,Depeng DU²,Zengguo DOU²,Yang SU²

1. The Collaborative Innovation Center of Coal Safety, Production of Henan Province, Jiaozuo 454003, Henan, China
2. State Key Laboratory Cultivation Base for Gas Geology and Gas Control, Henan Polytechnic University, Jiaozuo 454003, Henan, China

Received:2018-07-26 Revised:2018-10-28 Online:2019-01-05 Published:2019-01-05
Contact: Ligang ZHENG

摘要/Abstract

摘要：

开展了氢气-空气预混气在透明方管内的爆燃实验研究，分析在一端开口一端封闭的狭长空间内，浓度和点火位置对氢气-空气预混气爆燃特性的影响。实验结果表明：氢气浓度和点火位置对火焰锋面结构以及发展有重要影响；各当量比条件下，均在距封闭端100 mm位置点火时反应最为迅速；在极贫燃或极富燃条件下，点火位置对火焰发展影响更大。氢气浓度与点火位置共同作用于压力波形，以距封闭端300 mm点火位置为界，分别在管道前后两段点火时，不同当量比条件下超压波形呈现复杂变化。超压峰值对氢气浓度具有极强依赖性，并且浓度对爆燃超压的影响程度远大于点火位置；在各点火位置下，均在Φ = 1.25时获得最大超压；最大超压对应的点火位置取决于当量比。

关键词: 氢气, 浓度, 点火位置, 爆燃, 压力

Abstract:

To study the effect of the multiple concentrations and ignition locations on the characteristics of the premixed hydrogen-air deflagration, an experimental study is conducted in an elongated transparent square cross-section duct closed at one end and open at the opposite end. The results show that hydrogen concentration and ignition position exerted a great impact on the evolution of flame front structures. The reaction under each equivalence ratio proceeded most rapidly when the mixture was ignited at 100 mm from the closed end. The ignition position has a greater influence on flame development in very lean or rich fuel. The hydrogen concentration and ignition position simultaneously affected the pressure waveform. The overpressure waveform under different equivalence ratios presents complex changes when the ignition occurred in the left and right parts of the duct respectively, with the 300 mm from the closed end as the boundary of ignition position. The overpressure peak has a strong dependence on hydrogen concentration, and the effect of concentration on the overpressure peak is much greater than that of ignition location. The maximum overpressure peak was obtained in Φ = 1.25 at all ignition positions. the maximum overpressure corresponds to the ignition position which is depending on the equivalence ratio.

Key words: hydrogen, concentration, ignition position, deflagration, pressure

中图分类号:

TD 712

郑立刚, 朱小超, 于水军, 王亚磊, 李刚, 杜德朋, 窦增果, 苏洋. 浓度和点火位置对氢气-空气预混气爆燃特性影响[J]. 化工学报, 2019, 70(1): 408-416.

Ligang ZHENG, Xiaochao ZHU, Shuijun YU, Yalei WANG, Gang LI, Depeng DU, Zengguo DOU, Yang SU. Effect of concentration and ignition position on characteristics of premixed hydrogen-air deflagration[J]. CIESC Journal, 2019, 70(1): 408-416.

图/表 8

图1 实验系统图

Fig.1 Schematic diagram of experimental system

图2 Ф=0.6和Ф=1.25时不同点火位置下火焰前锋结构

Fig.2 Flame front evolution of IPs for Φ = 0.6 and Φ = 1.25

图3 火焰前锋位置随时间的变化

Fig.3 Flame front position versus time

图4 总燃烧时间随当量比的变化

Fig.4 Total combustion time versus Ф

图5 各点火位置处Φ = 0.4, 0.6, 1.25, 4.0, 5.0时超压波形随时间的变化

Fig.5 Overpressure waveforms versus time of Φ = 0.4, 0.6, 1.25, 4.0, 5.0 for IPS

图6 Φ =0.4时在IP500和IP900的超压随时间的变化波形

Fig.6 Overpressure waveforms versus time of Φ = 0.4 for IP500 and IP900

图7 各点火位置下Φ = 0.4时能谱密度与频率关系

Fig.7 Power spectral density versus frequency of Φ = 0.4 for IPs

图8 最大超压峰值柱形统计图

Fig.8 Histogram of maximum overpressure peak

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浓度和点火位置对氢气-空气预混气爆燃特性影响

Effect of concentration and ignition position on characteristics of premixed hydrogen-air deflagration

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