热载荷作用下天然气管道泄漏扩散特性分析  

Analysis of Natural Gas Pipeline Leakage Diffusion Characteristics under Thermal Load

作　　者：任海峰 REN Hai-feng(No.13 Project Department of Daqing Oil Field Construction Group Co.,Ltd.,Daqing 163000,China)

机构地区：[1]大庆市油建公司第十三项目部,黑龙江大庆163000

出　　处：《管道技术与设备》2018年第2期9-12,共4页Pipeline Technique and Equipment

摘　　要：文中考虑热载荷作用,采用k-ε湍流流动模型和涡耗散燃烧模型,建立了架空天然气管道泄漏扩散模型,研究了环境风速对泄漏天然气扩散燃烧及相邻火灾作用下扩散过程的影响。研究结果表明,在泄漏天然气扩散并且燃烧时,环境风速小于1 m/s虽对天然气扩散方向影响明显、但对其扩散范围和速度影响较小,环境风速超过7 m/s时,天然气扩散范围和速度明显增大;在相邻火灾作用时,低风速时天然气扩散受热源作用更大,但随风速增大其对天然气扩散速度和范围影响明显增强。Under the action of thermal load,the k-εturbulent flow model and the eddy dissipation combustion model were adopted,natural gas pipeline leakage diffusion model was set up,the influence of environmental wind speed on the leakage of natural gas diffusion combustion and adjacent fire was studied.The results show that when the leakage natural gas is diffusion and burning,environment wind speed less than 1 m/s although has a significant influence on natural gas diffusion direction but slight effect on diffusion range and speed.When wind speed is more than 7 m/s,the diffusion range and velocity of natural gas are obviously increased.Under the condition of adjacent fire,natural gas diffusion is more influenced by heat source at low wind speed.With wind speed increasing,diffusion speed and range influence are increasing significantly with wind speed increasing.

关 键 词：天然气管道 泄漏 热载荷 风速 数值模拟 涡耗散模型 

分 类 号：TE8[石油与天然气工程—油气储运工程]