煤矿巷道瓦斯爆炸冲击波与高温气流的关系

庞磊; 张奇; 李伟; 向聪; 谭汝媚

doi:10.11858/gywlxb.2011.05.012

煤矿巷道瓦斯爆炸冲击波与高温气流的关系

doi: 10.11858/gywlxb.2011.05.012

庞磊^1,2,,
张奇¹,
李伟¹,
向聪¹,
谭汝媚¹

1.
北京理工大学爆炸科学与技术国家重点实验室，北京 100081；
2.
北京市劳动保护科学研究所，北京 100054

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通讯作者:
庞磊

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出版历程
- 收稿日期: 2010-06-21
- 修回日期: 2010-09-25
- 发布日期: 2011-10-15

Relationship between Shock Wave and High-Temperature Flow Produced by Gas Explosion in Coal Mine Roadways

PANG Lei^{1,2
,},
ZHANG Qi¹,
LI Wei¹,
XIANG Cong¹,
TAN Ru-Mei¹

1.
State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China;
2.
Beijing Municipal Institute of Labour Protection, Beijing 100054, China

More Information

Corresponding author: PANG Lei

摘要

摘要: 为了给瓦斯爆炸后煤尘二次爆炸的深入研究提供理论依据，应用计算流体力学方法，对煤矿巷道内瓦斯爆炸的瞬态流场进行了数值模拟，得到了冲击波与高温气流流动的时空关系，并借助实验对数值方法进行了验证。研究表明：在瓦斯爆炸后的一定时间内，近场区域和远场的部分区域极有可能引发煤尘二次爆炸。给出了可能发生煤尘二次爆炸的区域随瓦斯区长度的函数关系式，以及远场中峰值温度和峰值超压到达时间的间隔随轴向距离和瓦斯区长度的分布特性。
- 瓦斯爆炸 /
- 冲击波 /
- 高温气流 /
- 数值模拟
Abstract: In order to provide theoretical basis for in-depth studies of coal dust explosion after gas explosion in coal mines, the unsteady flow field of gas explosion in roadways was numerically simulated by computational fluid dynamics method. The spatiotemporal relationship between shock wave and high-temperature flow was acquired, and the numerical method was verified by virtue of experiment. The study indicated that the near field and part of the far field are prone to secondary explosion of coal dust in certain period after the gas explosion. The functional relation of region of the possible secondary explosion with methane-air mixture length, and the distribution characteristic of arrival time interval of peak temperature and peak overpressure in far field with axial distance and methane-air mixture length were also proposed.
- gas explosion /
- shock wave /
- high-temperature flow /
- numerical simulation

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参考文献(12)

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