焊管2025，Vol.48Issue(2)：15-23,9.DOI:10.19291/j.cnki.1001-3938.2025.02.003
土壤-大气耦合下埋地输气管道泄漏扩散全过程模拟研究
Simulation Study on the Whole Process of Leakage and Diffusion of Buried Gas Pipeline under Soil-atmosphere Coupling
摘要
Abstract
In order to study the influence of buried gas pipeline leakage,ICEM was used for modeling and grid division.Fluent numerical simulation method was adopted to analyze the whole process of leakage diffusion of buried gas pipeline from diffusion cloud,concentration change of monitoring pointand vertical hazard distance,which can provide a theoretical basis for reducing casualties and property losses in accidents.Study shows that the concentration distribution of buried gas pipeline leakage in the soil is approximately circular,and when the natural gas overflows to ground,concentration distribution is transitioned from circular to radial;the lower limit boundary of methane explosion in soil and air increases faster;the larger the leakage aperture,delivery pressure,soil particle diameter,soil porosity and the shallower the depth of pipeline laying,the larger the natural gas leakage diffusion range,the faster the diffusion rate,and vertical hazard distance also increases.Downward leakage diffusion range is the smallest,the sidewall leakage is the second largest,and the upward leakage range is the largest.关键词
埋地输气管道/管道泄漏/气体扩散/危害距离Key words
buried gas pipeline/pipeline leakage/gas diffusion/hazard distance分类
能源科技引用本文复制引用
詹文文,巨成永,席敏敏,韦奉,牛爱军,黄晓辉,张君,张开..土壤-大气耦合下埋地输气管道泄漏扩散全过程模拟研究[J].焊管,2025,48(2):15-23,9.基金项目
2024年陕西省科协青年人才托举计划项目"超临界二氧化碳输送用HFW焊管研发"(项目编号20240513). （项目编号20240513）
