CO<sub>2</sub>-超细水雾对CH<sub>4</sub>/Air初期爆炸特性的影响

裴蓓; 韦双明; 陈立伟; 潘荣锟; 王燕; 余明高; 李杰

doi:10.11883/bzycj-2018-0147

CO₂-超细水雾对CH₄/Air初期爆炸特性的影响

doi: 10.11883/bzycj-2018-0147

裴蓓^1,,
韦双明¹,
陈立伟¹,
潘荣锟¹,
王燕¹,
余明高^2, ,,
李杰¹

1.
河南理工大学煤炭安全生产河南省协同创新中心, 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

基金项目:

国家自然科学基金 51604095

国家自然科学基金 51774059

国家自然科学基金 51774115

中国博士后科学基金 2018M630818

河南省科技攻关研究 172102310570

河南理工大学创新型科研团队 T2018-2

详细信息

作者简介:
裴蓓(1982-), 女, 博士, 讲师, smart128@126.com

通讯作者:
余明高(1963-), 男, 博士, 教授, mg_yu@126.com

中图分类号: O382;TD75.2
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- 被引次数: 0
出版历程
- 收稿日期: 2018-04-27
- 修回日期: 2018-05-22
- 刊出日期: 2019-02-05

Effect of CO₂-ultrafine water mist on initial explosion characteristics of CH₄/Air

1.
The Collaborative Innovation Center of Coal Safety Production of Henan Province, Henan Polytechnic University, Jiaozuo 454003, Henan, China
2.
State Key Laboratory of Coal Mine Disaster Dynamics Control, Chongqing University, Chongqing 400044, China

摘要

摘要: 为了研究CO₂和超细水雾对9.5%甲烷/空气初期爆炸特性的影响，采用高速纹影系统和定容燃烧弹对9.5%甲烷/空气初期爆炸特性进行了研究。分别改变CO₂稀释体积分数和超细水雾质量浓度，分析在二者单独和共同作用下球形火焰传播过程、火焰传播速度和爆炸超压的变化规律。结果表明：58.3 g/m³超细水雾增强了火焰不稳定性，促进了火焰加速和爆炸超压增加，表明超细水雾不足能产生促爆作用，只有当超细水雾充足时才会抑制甲烷爆炸；CO₂和超细水雾共同作用时能避免因超细水雾带来的促爆现象，可以明显减弱火焰不稳定性，减小火焰传播速度，降低爆炸超压和平均压升速率，以及明显推迟超压峰值来临时间。
- 二氧化碳 /
- 超细水雾 /
- 甲烷/空气 /
- 初期爆炸特性
Abstract: In order to study the effect of CO₂ and ultrafine water mist on the initial 9.5% methane/air explosion characteristics, a high speed schlieren system and a constant volume combustion bomb were used to study the 9.5% methane/air explosion characteristics. By changing the dilution volume fraction of CO₂ and mass concentration of ultrafine water mist respectively, the change rules of flame propagation speed and explosion overpressure were analyzed under two separate and combined actions. The results show that the ultrafine water mist with a mass concentration of 58.3 g/m³ enhanced the instability of the flame and accelerated flame acceleration and explosion overpressure. This indicates that the insufficiency of the ultrafine water mist can produce detonation promotion, and the methane explosion will be suppressed only when the ultrafine water mist is sufficient. When CO₂ and ultrafine water mist act together, it can avoid the explosion phenomenon caused by ultrafine water mist, weaken the instability of spherical flame significantly, reduce the propagation velocity of the spherical flame, decrease the explosion overpressure and the mean rate of pressure rise, and delay the arrival time of the overpressure peak. This study can provide a guidance for the prevention of methane explosion.
- carbon dioxide /
- ultrafine water mist /
- methane/air /
- initial explosion characteristics

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图 1 实验系统图

Figure 1. Schematic of experimental system

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图 2 9.5%甲烷/空气球形火焰的传播过程

Figure 2. 9.5% methane/air spherical flame propagation process

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图 3 CO₂对9.5%甲烷/空气球形火焰传播过程的影响

Figure 3. Effect of CO₂ on propagation of 9.5% methane/air spherical flame

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图 4 超细水雾对9.5%甲烷/空气球形火焰传播过程的影响

Figure 4. Effect of ultrafine water mist on propagation of 9.5% methane/air spherical flame

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图 5 CO₂-超细水雾对9.5%甲烷/空气球形火焰传播过程的影响

Figure 5. Effect of CO₂ and ultrafine water mist on propagation of 9.5% methane/air spherical flame

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图 6 CO₂-超细水雾对9.5%甲烷/空气火焰传播速度的影响

Figure 6. Effect of CO₂-ultrafine water mist on flame propagation speed of 9.5% methane/air

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图 7 CO₂和超细水雾对9.5%甲烷/空气爆炸超压的影响

Figure 7. Influences of CO₂ and ultrafine water mist on explosion overpressure of 9.5% methane/air

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图 8 CO₂-超细水雾对9.5%甲烷/空气的抑爆效果

Figure 8. Effect of CO₂-ultrafine water mist on explosion suppression of 9.5% methane/air

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