石油与天然气化工2025，Vol.54Issue(5)：175-182,8.DOI:10.3969/j.issn.1007-3426.2025.05.021
隧道内氢气管道泄漏扩散规律及泄漏点定位模型
Dispersion law of hydrogen releases from pipelines in the tunnel and leakage point location model
摘要
Abstract
Objective Hydrogen leakage in a long-distance pipeline within a tunnel can result in hydrogen accumulation,creating a potential hazard of ignition and explosion.Investigating the leakage and dispersion laws of hydrogen in tunnels offers critical insights into accident prevention and emergency response,contributing to improved safety in pipeline transport.Method A numerical model was established based on the design parameters of a hydrogen pipeline in China.Computational fluid dynamics simulations were carried out for three accident cases with leakage hole diameters of 10.0 mm,12.5 mm and 15.0 mm using FLUENT software.The leakage and diffusion process and volume fraction distribution of hydrogen in the tunnel were studied.A leakage point location model was established.Result After the leakage,hydrogen mainly accumulated at the top of the tunnel.The volume fraction showed a Gaussian distribution in the horizontal direction and obvious stratification in the vertical direction.Over time,some of the hydrogen that had leaked moved downstream,while the rest stayed in the formed hydrogen layer,leading to a localized increase in hydrogen volume fraction.The volume fraction field of hydrogen in the tunnel after the leakage had a self-similarity that did not depend on the spatial size of the tunnel and the amount of leakage.Based on the self-similarity,a mathematical model of leakage point location was established,which could be applied to the working conditions of different tunnel sizes and leakage amounts(leakage pressure and hole diameter).The leakage point location and leakage aperture estimation were achievable through the model,with a positioning accuracy of up to 4.4%and an aperture estimation error of≤15%.Conclusion The study of hydrogen leakage and dispersion in the tunnel can provide a basis for the layout of leakage monitoring and hydrogen depletion devices.The leakage point location model enables rapid prediction of accident scenario evolution and formulates disposal measures.关键词
氢气管道/泄漏扩散/隧道/泄漏定位/自相似性/数值模拟Key words
hydrogen pipeline/leakage and dispersion/tunnel/leakage point location/self-similarity/numerical simulation引用本文复制引用
李雪洁,王智,范振宁,席治国,李玉星,刘翠伟..隧道内氢气管道泄漏扩散规律及泄漏点定位模型[J].石油与天然气化工,2025,54(5):175-182,8.基金项目
国家自然科学基金项目"规模绿氢储输过程致灾机理及事故链阻断策略研究"(U24B6017) （U24B6017）
国家重点研发计划"战略性科技创新合作"重点专项"面向长距离大规模纯氢和天然气掺氢输运系统的高参数长寿命及安全设计合作研究"(2024YFE0211500) （2024YFE0211500）
泰山产业领军人才工程专项经费资助(tscx202408056) （tscx202408056）
