焊管2024，Vol.47Issue(7)：18-25,31,9.DOI:10.19291/j.cnki.1001-3938.2024.07.003
架空输气管道泄漏扩散参数敏感性仿真研究
Simulation Study on Leakage Diffusion Parameter Sensitivity of Overhead Gas Transmission Pipeline
摘要
Abstract
In order to reduce the risk of leakage in urban overhead natural gas pipelines,the influences of internal pressure,leakage aperture,leakage port number and leakage direction on the leakage flow field were analyzed by using the component transport model andrealizable k-ε turbulence model.The analysis results show that with the increase of pipeline internal pressure or leakage aperture,pipeline leakage shows a more concentrated trend,the leakage rate and leakage height of the leakage port are significantly increased,the leakage cloud migration degree is lower,and the influence of aperture change on the final stable mass fraction of natural gas is stronger than the influence of pipeline internal pressure change.With the increase of the number of leakage ports,the leakage amount in the initial stage of leakage increases,and the diffusion width of natural gas increases significantly,and the dangerous area of buildings caused by natural gas leakage is larger.The quality fraction of natural gas with multiple leakage ports on the two monitoring surfaces increases significantly compared with single leakage port.The direction of the leakage port has a great influence on the diffusion of natural gas.The diffusion height under the conditions of cross wind is much higher than that under the conditions of upwind and downwind,but a huge diffusion cloud is formed in front of the front buildings under the conditions of upwind,and a large amount of natural gas accumulates between the buildings under the conditions of downwind,all of which pose great security risks to the buildings.关键词
天然气管道/泄漏/扩散/数值模拟/风险评估Key words
natural gas pipeline/leakage/diffusion/numerical simulation/risk assessment分类
能源科技引用本文复制引用
王锡军,王佳,程伟,肖开阳,杨军,范佳锐,姚力萍,汤历平..架空输气管道泄漏扩散参数敏感性仿真研究[J].焊管,2024,47(7):18-25,31,9.基金项目
全国总工会补助项目"油气管道腐蚀机理及防腐措施研究"(项目编号2016-2901). （项目编号2016-2901）
