氢气比例和点火能量对CH<sub>4</sub>-H<sub>2</sub>混合气体爆炸强度影响的实验研究

马秋菊; 邵俊程; 王众山; 刘家平

doi:10.11858/gywlxb.20190803

氢气比例和点火能量对CH₄-H₂混合气体爆炸强度影响的实验研究

doi: 10.11858/gywlxb.20190803

1.
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
2.
北京理工大学爆炸科学与技术国家重点实验室，北京　100081

基金项目: 国家重点研发计划（2017YFC08003300）；爆炸科学与技术国家重点实验室（北京理工大学）开放课题（KFJJ18-03M）；“煤炭资源与安全开采”国家重点实验室开放基金（SKLCRSM19KFA11）

详细信息

作者简介:
马秋菊（1987－），女，博士，讲师，主要从事燃爆动力学研究. E-mail: ma200609@126.com

中图分类号: O381; TD712.7
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出版历程
- 收稿日期: 2019-07-03
- 修回日期: 2019-07-23

Experimental Study of the Hydrogen Proportion and Ignition Energy Effects on the CH₄-H₂ Mixture Explosion Intensity

1.
State Key Laboratory of Coal Resources and Safe Mining, China University of Mining & Technology (Beijing), Beijing 100083, China
2.
State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China

摘要

摘要: 在20 L标准球形爆炸罐内开展了当量比为1的甲烷-氢气-空气混合气体爆炸实验，通过改变点火能量和氢气体积分数，探讨点火能量和气体比例对其爆炸压力和爆炸强度的影响。研究发现：氢气比例越高，爆炸冲击波传播速度越快，点火能对冲击波传播速度的影响相对较小；点火能量的提高对峰值超压有增强作用，氢气比例低时，此增强作用较显著，氢气比例高时，此增强作用较弱；点火能量对爆炸强度指数K_G的影响较小，而氢气比例对爆炸强度指数K_G的影响十分明显，氢气比例低于50%时，氢气比例的增加对爆炸强度的增强作用较弱，氢气比例高于50%时，氢气的增加对爆炸强度的激励作用急剧增强。另外发现，相同当量比条件下，氢气的爆炸强度指数近似为甲烷爆炸强度指数的10倍。
- CH₄-H₂混合气体 /
- 点火能量 /
- 氢气比例 /
- 爆炸超压 /
- 爆炸强度指数
Abstract: CH₄-H₂mixture explosion experiments were performed in a 20 L spherical explosion vessel with the equivalence ratio of 1. Gas proportion and ignition energy were varied to explore their effects on the explosion pressure and intensity. It is found that higher hydrogen proportion causes higher explosion shock wave propagation speed, while the ignition energy has little effects on the explosion shock wave propagation speed. Higher ignition energy can enhance the explosion overpressure, and this enhancement effect is remarkable when the hydrogen proportion is lower, and is not evident when the hydrogen proportion is higher. The effect of ignition energy on the explosion severity index K_G is not evident, but the effect of hydrogen proportion on K_G is remarkable. The positive effect of hydrogen addition on K_G is very slight at low hydrogen proportion while it becomes much more pronounced at higher hydrogen contents. Furthermore, the explosion intensity of hydrogen is approximately tenfold of that of methane explosion with corresponding same equivalent ratio, and therefore, the presence of hydrogen will greatly enhance the explosion hazard of methane.
- CH₄-H₂ mixture /
- ignition energy /
- hydrogen proportion /
- explosion overpressure /
- gas explosion severity index

HTML全文

图 1 20 L球形爆炸罐及实验装置

Figure 1. 20 L spherical explosion vessel and experimental devices

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图 2 爆炸超压-时间历程曲线

Figure 2. Overpressure-time curves for each case

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图 3 不同氢气体积分数时峰值超压随点火能量的变化

Figure 3. Peak overpressure varying with ignition energy under different volume fractions of hydrogen

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图 4 不同点火能量下峰值超压随氢气体积分数的变化

Figure 4. Peak overpressure varying with volume fraction of hydrogen under different ignition energies

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图 5 不同点火能时K_G随氢气体积分数的变化

Figure 5. K_G varying with the volume fraction of hydrogen under different ignition energies

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表 1 实验中CH₄-H₂-Air混合物的组分比例

Table 1. Mixture compositions in the explosion test

X/% Equivalence ratio ψ = 1
w(H₂)/% w(CH₄)/% w(Air)/%

0 0 9.50 90.50
0.3 3.58 8.35 88.07
0.5 7.19 7.19 85.62
0.7 12.67 5.43 81.90
1.0 29.58 0 70.42

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