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[1]晏玉婷,张赫然,李俊明,等.中压天然气管道泄漏扩散模拟研究[J].中国安全生产科学技术,2014,10(5):5-10.[doi:10.11731/j.issn.1673-193x.2014.05.001]
　YAN Yuting,ZHANG Heran,LI Junming,et al.Simulations on diffusion of natural gas in the soil for medium-pressure gas pipeline leak[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2014,10(5):5-10.[doi:10.11731/j.issn.1673-193x.2014.05.001]
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中压天然气管道泄漏扩散模拟研究
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
10
期数:
2014年5期
页码:
5-10
栏目:
学术论著
出版日期:
2014-05-31

文章信息/Info

Title:
Simulations on diffusion of natural gas in the soil for medium-pressure gas pipeline leak
文章编号:
20140501
作者:
晏玉婷; 张赫然; 李俊明; 陆 路
（清华大学 热能工程系，热科学与动力工程教育部重点实验室，北京 100084）
Author(s):
YAN Yuting;  ZHANG Heran;  LI Junming;  LU Lu
(Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Thermal Engineering, Tsinghua University, Beijing 100084, China)
关键词:
天然气管道; 泄漏扩散; 土壤; 数值模拟
Keywords:
natural gas pipeline;  leakage and diffusion;  soil;  simulation
分类号:
X937
DOI:
10.11731/j.issn.1673-193x.2014.05.001
文献标志码:
A
摘要:
建立了埋地中压天然气管道发生泄漏时时的数学模型，将土壤视为各向同性的多孔介质，采用FLUENT对天然气在土壤中的扩散规律及浓度分布进行模拟，分析不同时刻地表的危险区域范围，并对比了不同管道压力、泄漏孔径大小、泄漏位置等工况下危险半径随时间的变化。结果表明：管道压力越大，泄漏的体积流量越大，同一时间危险范围越大；相同的泄漏压力下，泄漏孔径对危险半径没有很大影响；不同泄漏孔位置，泄漏初期向上开口时危险半径最大，一段时间后向下开口危险半径最大。
Abstract:
A 2-D CFD model of a buried mediumpressure pipeline was set up and simulated by FLUENT to research the diffusion law and gas concentration for the natural gas leaking into the soil. The soil was taken as homogeneous porous medium in this model. The radius of dangerous area on the surface at different time was described, and different factors such as pipe pressure, leak size, leak location were analyzed. The results showed that higher inlet pressure causes larger volume flow and wider dangerous area at the same time. Leak hole diameter effects slightly on the dangerous area radiuses for the same inlet pressure. The radius of dangerous area for the upward leak direction is largest initially while the radius of downward direction exceeds to be the largest after a certain time.

参考文献/References:

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备注/Memo

备注/Memo:
国家重点基础研究发展计划（973）课题（2011CB706904）
更新日期/Last Update: 2014-05-31