|本期目录/Table of Contents|

[1]吕鹏飞,张家旭,梁涛,等.点火位置对污水管网可燃气体爆燃特性影响模拟研究[J].中国安全生产科学技术,2019,15(10):51-56.[doi:10.11731/j.issn.1673-193x.2019.10.008]
 LYU Pengfei,ZHANG Jiaxu,LIANG Tao,et al.Simulation research on influence of ignition position on deflagration characteristics of combustible gas in sewage pipe network[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2019,15(10):51-56.[doi:10.11731/j.issn.1673-193x.2019.10.008]
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点火位置对污水管网可燃气体爆燃特性影响模拟研究
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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10期
页码:
51-56
栏目:
职业安全卫生管理与技术
出版日期:
2019-10-31

文章信息/Info

Title:
Simulation research on influence of ignition position on deflagration characteristics of combustible gas in sewage pipe network
文章编号:
1673-193X(2019)-10-0051-06
作者:
吕鹏飞张家旭梁涛刘开沅庞磊杨凯邱士龙
(北京石油化工学院 安全工程学院,北京 102617)
Author(s):
LYU Pengfei ZHANG Jiaxu LIANG Tao LIU Kaiyuan PANG Lei YANG Kai QIU Shilong
(School of Safety Engineering,Beijing Institute of Petrochemical Technology,Beijing 102617,China)
关键词:
气体爆炸点火位置污水管网爆燃特性数值模拟
Keywords:
gas explosion ignition position sewage pipe network deflagration characteristics numerical simulation
分类号:
X932;O383
DOI:
10.11731/j.issn.1673-193x.2019.10.008
文献标志码:
A
摘要:
针对典型市政污水管网内可燃气体爆燃过程,采用流体动力学软件Fluidyn,建立了由顶端封闭、深度为4 m的竖直检查井和两端开口、长度各为20 m的水平井构成的管网模型,研究了不同点火位置(检查井上部、中部和下部)对甲烷爆燃特性的影响。研究结果表明:不同位置点火时,管网内测点压力时程呈现出亥姆霍兹振荡,各压力峰值曲线具有明显的分段性,且相同测点的数值接近;爆炸温度在点火位置附近出现最大值,其中上部点火时数值最大,中部点火时居中,下部点火时最小,但在水平井内温度峰值近似呈线性衰减并在端口出现最小值;与下部点火相比,上部和中部点火时,检查井和水平井连接处扩容效应造成火焰传播速度衰减显著,但在水平井内均近似呈线性增大并在端口出现最大值。
Abstract:
Aiming at the deflagration process of combustible gas in typical municipal sewage pipe network,a pipe network model was established by using the fluid dynamics software Fluidyn,which consisted of a vertical inspection well with closed top and 4 m depth and a horizontal well with openings at both ends and 20 m in length.The influence of different ignition positions (at the top,middle and bottom of inspection well) on the deflagration characteristics of methane was studied.The results showed that when ignited at different positions,the curves of pressure vs.time of the test points in the pipe network presented the Helmholtz oscillation.The peak pressure curves had obvious piecewise characteristics,and the values of the same test point were close to each other.The maximum explosion temperature occurred near the ignition position,and the value was the largest with top ignition,followed by middle ignition,and the smallest with bottom ignition.However,the peak temperature in the horizontal well approximately presented the linear decrease,and the minimum value appeared at the port.Compared with the bottom ignition,the expansion effect at the junction of the inspection well and the horizontal well resulted in a significant attenuation of flame propagation velocity with the top and middle ignition,but it approximately presented the linear increase in the horizontal well and reached the maximum value at the port.

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备注/Memo

备注/Memo:
收稿日期: 2019-07-13;数字出版日期: 2019-10-26
* 基金项目: 国家自然科学基金项目(51604031);2017年安全生产重特大事故防治关键技术科技项目(beijing-0007-2017AQ);2019年度北京市属高校高水平教师队伍建设支持计划青年拔尖人才培育计划项目(CIT&TCD201904045);北京市科技计划项目 (Z181100009018003);北京市自然科学基金委员会-北京市教育委员会联合基金项目 (KZ201910017020)
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更新日期/Last Update: 2019-11-05