Flame-propagation behavior and a dynamic model for the thermal-radiation effects in coal-dust explosions

被引：67

作者：

Cao, Weiguo ^{[1
]}

Gao, Wei ^{[2
]}

Liang, Jiyuan ^{[1
]}

Xu, Sen ^{[1
]}

Pan, Feng ^{[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 116024, Peoples R China

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

来源：

JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES | 2014年 / 29卷

关键词：

Coal-dust explosion; Flame-propagation behavior; Fireball thermal radiation; Dynamic model;

D O I：

10.1016/j.jlp.2014.02.002

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

To reveal the flame-propagation behavior and the thermal-radiation effects during coal-dust explosions, two coal-dust clouds were tested in a semi-enclosed vertical combustion tube. A high-speed video camera and a thermal infrared imaging device were used to record the flame-propagation process and the thermal-radiation effects of the fireball at the combustion-tube outlet. The flame propagated more quickly and with a higher temperature in the more volatile coal-dust cloud. The coal-dust concentration also significantly affected the propagation behavior of the combustion zone. When the coal-dust concentration was increased, the flame-propagation velocity and the fireball temperature increased before decreasing overall. Based on the experimental results, a dynamic model of the thermal radiation was employed to describe the changes in the fireballs quantitatively and to estimate the thermal-radiation effects during coal-dust explosions. (c) 2014 Elsevier Ltd. All rights reserved.

引用

页码：65 / 71

页数：7

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