|本期目录/Table of Contents|

[1]孟亦飞,董铭鑫,赵东风,等.大尺寸通风管网中障碍物对瓦斯爆炸冲击波传播特性影响的数值模拟[J].中国安全生产科学技术,2019,15(2):99-104.[doi:10.11731/j.issn.1673-193x.2019.02.016]
 MENG Yifei,DONG Mingxin,ZHAO Dongfeng,et al.Numerical simulation on influence of obstacle on propagation characteristics of shock wave caused by gas explosion in large size ventilation pipe network[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2019,15(2):99-104.[doi:10.11731/j.issn.1673-193x.2019.02.016]
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大尺寸通风管网中障碍物对瓦斯爆炸冲击波传播特性影响的数值模拟
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
15
期数:
2019年2期
页码:
99-104
栏目:
职业安全卫生管理与技术
出版日期:
2019-02-28

文章信息/Info

Title:
Numerical simulation on influence of obstacle on propagation characteristics of shock wave caused by gas explosion in large size ventilation pipe network
文章编号:
1673-193X(2019)-02-0099-06
作者:
孟亦飞1董铭鑫2赵东风1贾进章3
(1.中国石油大学(华东) 化学工程学院,山东 青岛 266580;
2.中国石油大学(华东) 机电工程学院,山东 青岛 266580;
3.辽宁工程技术大学 安全科学与工程学院,辽宁 阜新 123000)
Author(s):
MENG Yifei1 DONG Mingxin2 ZHAO Dongfeng1 JIA Jinzhang3
(1. College of Chemical Engineering, China University of Petroleum (East China), Qingdao Shandong 266580, China;
2. College of Mechanical and Electrical Engineering, China University of Petroleum (East China), Qingdao Shandong 266580, China;
3. College of Safety Science and Engineering, Liaoning Technical University, Fuxin Liaoning 123000, China)
关键词:
瓦斯爆炸冲击波大尺寸通风管网障碍物数值模拟
Keywords:
gas explosion shock wave large size ventilation pipe network obstacle numerical simulation
分类号:
X936; TD712
DOI:
10.11731/j.issn.1673-193x.2019.02.016
文献标志码:
A
摘要:
为了研究大尺寸通风管网中的瓦斯爆炸传播规律,采用数值模拟方法,针对具有不同障碍物数量的大尺寸通风管网模型,利用Fluent分析管网中各个监测点的超压变化曲线以及障碍物附近的速度矢量图,分析爆炸冲击波传播规律。研究结果表明:初期瓦斯爆炸后,障碍物的存在改变了通风管网内未燃瓦斯的积聚区域;高温和高压发生耦合作用,在氧气相对充足的进气管道中形成二次爆炸;障碍物与火焰波以及管网自身结构变化等多种因素形成复合作用,改变了通风管网内瓦斯爆炸冲击波的传播路径和叠加区域的位置;无障碍物时高压区域出现在进气管道中,有障碍物时高压区域出现在中部直管与斜管的交汇处附近,且数值相对较大。
Abstract:
At present, the research on the propagation laws of gas explosion mainly focuses on single pipe or simple bifurcated pipe without ventilation. In order to study the propagation laws of gas explosion in the large size ventilation pipe network, through using the method of numerical simulation and aiming at the model of large size ventilation pipe network with different amounts of obstacle, the change curve of overpressure at each monitoring point and the velocity vector diagrams around the obstacle in the pipe network were analyzed by using Fluent, and the propagation laws of explosion shock wave were analyzed. The results showed that after the initial gas explosion, the existence of obstacle changed the accumulation area of unburned gas in the ventilation pipe network. The secondary explosion occurred in the intake pipe with relatively sufficient oxygen due to the coupling effect of high temperature and high pressure. The propagation path of shock wave caused by gas explosion and the location of superimposed area in the ventilation pipe network changed due to the combined effect of multiple factors including the obstacle, flame wave, structural change of pipe network, etc. The highpressure area appeared in the intake pipe when there was no obstacle, while when there was an obstacle, the highpressure area appeared near the intersection of middle straight pipe and inclined pipe, with a relatively large value.

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备注/Memo

备注/Memo:
收稿日期: 2018-11-27
基金项目: 国家自然科学基金项目(21406271)
作者简介: 孟亦飞,博士,讲师,主要研究方向为化工过程安全、定量风险评估技术、事故后果模拟计算等。
通信作者: 董铭鑫,博士研究生,主要研究方向为瓦斯爆炸、化工过程安全、事故后果模拟计算等。
更新日期/Last Update: 2019-03-06