Experimental and numerical study on flame propagation behaviors in coal dust explosions

被引：76

作者：

Cao, Weiguo ^{[1
]}

Gao, Wei ^{[2
]}

Peng, Yuhuai ^{[1
]}

Liang, Jiyuan ^{[1
]}

Pan, Feng ^{[1
,3
]}

Xu, Sen ^{[1
,3
]}

机构：

[1] Nanjing Univ Sci & Technol, Sch Chem Engn, Nanjing 210094, Jiangsu, Peoples R China

[2] Dalian Univ Technol, Sch Chem Machinery, Dalian 716024, Liaoning, Peoples R China

[3] Natl Qual Supervis & Inspect Ctr Ind Explos Mat, Nanjing 210094, Jiangsu, Peoples R China

来源：

POWDER TECHNOLOGY | 2014年 / 266卷

关键词：

Coal dust explosion; Flame propagation; Flame temperature; Numerical simulation; Flow velocity; PREVENTION;

D O I：

10.1016/j.powtec.2014.06.063

中图分类号：

TQ [化学工业];

学科分类号：

081705 [工业催化];

摘要：

To reveal the flame propagation behaviors during coal dust explosions, a kind of coal dust cloud was studied through experiment and numerical simulation in semi-enclosed vertical combustion tubes with different lengths. A high speed video camera and a thermal infrared imaging device were used to record the flame propagation process. The result indicated that the supreme flame propagation velocity and the highest flame temperature both rose gradually with the tube length increasing. Meanwhile, FLUENT was applied to numerical simulation of flame propagation behaviors during the coal dust explosions. The simulation result showed the flame combustion and the temperature varying process was consistent with the experimental result. It also revealed the distribution of flow velocity in the flow field during the combustion process, which indicated that flow velocity higher than flame propagation velocity was an important reason for dust re-entrainment and consistent explosion. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：456 / 462

页数：7

共 23 条

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