Influence of bend structure on high-temperature flow after gas explosion

被引：11
|
作者：
Pang, L. [1 ,2 ]
Gao, J. C. [1 ]
Ma, Q. J. [2 ]
Chen, J. C. [2 ]
Meng, Q. Q. [1 ]
Tan, J. L. [3 ]
Zhang, Q. [2 ]
机构：
[1] Beijing Inst Petrochem Technol, Beijing 102617, Peoples R China
[2] Beijing Inst Technol, State Key Lab Explos Sci & Technol, Beijing 100081, Peoples R China
[3] Beijing Municipal Inst Labour Protect, Beijing 100054, Peoples R China
来源：
EXPERIMENTAL THERMAL AND FLUID SCIENCE | 2013年 / 49卷
基金：
中国博士后科学基金; 北京市自然科学基金;
关键词：
Gas explosion; Bend structure; High temperature flow; Thermal loss; Turbulence; NUMERICAL-SIMULATION; PROPAGATION; PREDICTION; OBSTACLES; MODEL;
D O I：
10.1016/j.expthermflusci.2013.05.001
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
In order to study on the influence of bend structures on high-temperature flow of gas explosion in laneways/tubes, a set of experimental facility for gas explosion in tubes with bend structures of different angles and a transient temperature and pressure test system were set up, with the help of which, the variation process of unsteady temperature field when high-temperature flow of methane-air explosion going through the bend structure was studied. The study results show that the bend structure has little influence on high-temperature flow before the bend and has relatively great influence on that after the bend. The bigger the bend angle is, the greater the thermal loss at the bend will be and then the greater the temperature attenuation of the high-temperature flow going through the bend structure will be. In addition, the attenuation of peak temperature after the bend compared with that of corresponding location in the straight tube presents a linear distribution with the bend angle. The above conclusions provide reference basis for compound hazard effect assessment of gas explosion in a complex structure as well as corresponding accident investigation and analysis. (c) 2013 Elsevier Inc. All rights reserved.
引用
收藏
页码：201 / 205
页数：5
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