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Numerical study on harmful boundary of above-ground section leakage of natural gas pipeline

摘要:Natural gas has incomparable advantages compared with other energy, but the accidents caused by natural gas pipeline transportation cannot be ignored. In order to reduce the accident damage, it is necessary to master the concentration distribution of leaked gas in the atmosphere scientifically. The main contribution of this research is to predict the harmful boundary of gas diffusion. Numerical simulation was used to establish the leakage diffusion model of natural gas pipeline exposed to atmosphere. The influences of leakage rate, leakage diameter and wind speed on the harmful boundary of gas were studied. The results show that harmful boundary reaches a stable state after a period of leakage. Leakage rate and leakage diameter contribute to vertical height of harmful boundary, and have little effect in the horizontal direction. Wind speed is the main factor affecting gas diffusion path. Increasing wind speed results in decrease of vertical height and increase of horizontal distance of harmful boundary, gas diffusion develops near the ground in the downwind direction. The quantitative formula between harmful boundary of gas diffusion and influencing factors is proposed. This work has a great guiding significance for emergency rescue work in engineering.

关键字:Pipeline leakage; Harmful boundary; Diffusion; Wind speed; Numerical simulation

ISSN号:0950-4230

卷、期、页:卷: 80

发表日期:2022-12-01

影响因子:3.659600

期刊分区(SCI为中科院分区):三区

收录情况:SCIE(科学引文索引网络版),EI(工程索引)

发表期刊名称:JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES

通讯作者:于巧燕,李延豪,柴冲,刘珈铨,杨凯

第一作者:侯磊

论文类型:期刊论文

论文概要:于巧燕,侯磊,李延豪,柴冲,刘珈铨,杨凯,Numerical study on harmful boundary of above-ground section leakage of natural gas pipeline,JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES,2022,卷: 80

论文题目:Numerical study on harmful boundary of above-ground section leakage of natural gas pipeline

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