中国安全科学学报 ›› 2019, Vol. 29 ›› Issue (9): 43-50.doi: 10.16265/j.cnki.issn1003-3033.2019.09.007

• 安全系统学 • 上一篇    下一篇

综合管廊天然气泄漏扩散及监控方法优化研究

何乐平1 讲师, 唐爽1, 胡启军1 教授, 蔡其杰2, 石仁丹3   

  1. 1 西南石油大学 土木工程与建筑学院,四川 成都 610500;
    2 西南交通大学 交通运输与物流学院,四川 成都 610031;
    3 德阳市自然资源和规划局,四川 德阳 618000
  • 收稿日期:2019-06-10 修回日期:2019-08-09 出版日期:2019-09-28 发布日期:2020-10-30
  • 作者简介:何乐平 (1979—),女,四川成都人,博士研究生,讲师,从事于风险评估与失效分析以及防灾减灾工程。E-mail:201231010028@swpu.edu.cn。
  • 基金资助:
    国家自然科学基金资助(51574201);四川省教育厅科研创新团队资助(18TD0014)。

Study on natural gas leakage and diffusion in utility tunnels and optimization of monitoring methods

HE Leping1, TANG Shuang1, HU Qijun1, CAI Qijie2, SHI Rendan3   

  1. 1 School of Civil Engineering and Architecture, Southwest Petroleum University, Chengdu Sichuan 610500, China;
    2 School of Transportation and Logistics, Southwest Jiaotong University, Chengdu Sichuan 610031, China;
    3 Deyang Natural Resources and Planning Bureau, Deyang Sichuan 618000, Chin
  • Received:2019-06-10 Revised:2019-08-09 Online:2019-09-28 Published:2020-10-30

摘要: 为确定综合管廊内CH4探头的布设位置,提高天然气舱室内天然气管道运输的安全性,采用计算流体动力学(CFD)三维模拟的方法,研究管道压力等级、泄漏孔径、泄漏角度、通风速度、通风温度以及截面类型综合影响因素下的CH4泄漏扩散分布情况。结果表明:各影响因素下CH4扩散高度随纵向扩散长度的增加,先上升至管廊顶部位置,后迁移至舱室底部;当管道不处于舱室中心时,CH4探头应布设在距离管道更近的舱室壁上;当管道位于舱室中心时,在壁面两侧的任意一侧安装均可;探头沿舱室高度方向的布设位置应高于释放源0.6~1.6 m。

关键词: 综合管廊, 天然气管道, 泄漏扩散, CH4探头, 计算流体动力学(CFD)数值模拟

Abstract: In order to determine locations of CH4 sensors in utility tunnels so as to improve safety of gas transportation in natural gas compartments, a three-dimensional CFD model was built to study CH4 leakage and diffusion under factors of pipeline pressure grade, leakage aperture, leakage angle, ventilation speed, ventilation temperature and section type. The results show that CH4 diffusion rises to utility top and then migrates down to compartment bottom along with increase of longitudinal diffusion length under comprehensive factors. CH4 sensors should be placed on walls that are much closer to pipes if the pipe is not in the center of compartment or installed on either side of the wall when it is at the center. And sensors should be 0.6-1.6 m high above gas release source.

Key words: utility tunnel, natural gas pipe, leakage diffusion, CH4 sensor, computational fluid dynamics(CFD)numerical simulation

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