燃气管网相邻地下空间天然气泄漏扩散研究  

Study on Gas Leakage Diffusion in Adjacent Underground Space of Gas Pipe Network

作　　者：赵光帅 常松 闫宇 ZHAO Guangshuai;CHANG Song;YAN Yu(Zhengyuan Digital Technology Research Institute,Beijing 101300;Zhengyuan Geographic Information Group Co.,Ltd.,Beijing 101300)

机构地区：[1]正元数字科技研究院,北京101300 [2]正元地理信息集团股份有限公司,北京101300

出　　处：《中国科技纵横》2024年第19期66-68,共3页China Science & Technology Overview

摘　　要：随着时间推移及不可抗力因素影响,埋地燃气输送管网可能发生泄漏,进而导致相邻地下空间发生燃气积聚扩散现象。为探明地下燃气管道泄漏后燃气在相邻地下空间内的扩散行为,本文借助气体泄漏模型和高速扩散模型,分别研究了不同风速和不同等级大气稳定度对燃气泄漏扩散浓度分布的影响。结果表明,燃气泄漏后,在管线内浓度呈现快速下降趋势。在同一大气稳定度条件下,风速增加会加速燃气扩散,降低管线内燃气浓度。而在不同大气稳定度条件下,稳定度等级越低,空气流动越缓慢,更容易造成燃气积聚。With the passage of time and the influence of force majeure factors,the buried gas transmission network may leak,which will lead to the accumulation and diffusion of gas in the adjacent underground space.In order to investigate the diffusion behavior of gas in adjacent underground space after leakage of underground gas pipeline,the effects of different wind speed and atmospheric stability on gas leakage diffusion concentration distribution were studied by means of gas leakage model and high-speed diffusion model.The results show that the concentration of gas in the pipeline decreases rapidly after gas leakage.With the same atmospheric stability,the increase of wind speed will accelerate the gas diffusion and reduce the gas concentration in the pipeline.At different atmospheric stability levels,the lower the stability level,the slower the air flow,and the easier it is to cause gas accumulation.

关 键 词：天然气 燃气扩散 燃气泄漏 地下空间 

分 类 号：TE88[石油与天然气工程—油气储运工程]