Gas explosion flame propagation over various hollow-square obstacles

被引：61
|
作者：
Yu, Minggao [1 ,2 ]
Zheng, Kai [1 ]
Chu, Tingxiang [1 ,2 ]
机构：
[1] Chongqing Univ, State Key Lab Coal Mine Disaster Dynam & Control, Chongqing 400044, Peoples R China
[2] Henan Polytech Univ, Sch Safety Sci & Engn, Jiaozuo 454003, Peoples R China
来源：
JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING | 2016年 / 30卷
关键词：
Gas explosion; Hollow-square obstacle; Flame turbulent intensity; Flame propagating velocity; Overpressure; METHANE-AIR; ACCELERATION; OVERPRESSURE; SUPPRESSION;
D O I：
10.1016/j.jngse.2016.02.009
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
A semi-confined transparent chamber measuring 150 mm x 150 mm x 500 mm was constructed. The gas explosion flame propagated away from the ignition source and interacted with a single hollow square obstacle along its path. The effects of the hollow-square obstacle on gas explosion characteristics were experimentally investigated. Three hollow-square obstacles, with different internal shapes (triangular, square, and circular) but covering the same blockage ratio of 30% were studied. The triangular hollow-square obstacle was found to cause the highest flame turbulence intensity, flame propagating velocity, and explosion overpressure, whereas the circular hollow-square obstacle yielded the lowest values. Mechanisms for the observed phenomena were also discussed in detail and numerical simulations were conducted to validate the mechanism. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：221 / 227
页数：7
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