摘要
对于天然气管道泄漏扩散模型的研究多集中在地表管道上,而我国长输管道多为埋地管道,所以研究天然气在土壤中的扩散规律,以建立埋地管道泄漏扩散模型是非常有必要的。天然气为牛顿流体,其在土体中的流动可用达西定律来描述,通过推导管道泄漏速率计算公式、考虑气体压缩特性的渗透速度计算公式最终得到埋地管道泄漏地表流量计算公式,可以此流量作为输入参数,应用各类地面上气体扩散模型模拟天然气的泄漏扩散过程。
The study on natural gas pipeline leakage diffusion model was focused on surface pipeline. But most long-distance pipeline in our country was buried pipeline. So it was very necessary to study the diffusion law of natural gas diffusing in the soil in order to establish leakage diffusion model of buried pipeline. As natural gas was Newtonian fluid,its flowing law in the soil can be described by Darcy law. The leakage flow formula on surface of buried pipeline can be derived with pipeline leak rate formula and seepage velocity formula considering gas compression feature. The value of leakage flow can be used as parameter to simulate natural gas leakage diffusion process using various gas diffusion model of surface pipeline.
出处
《广州化工》
CAS
2015年第2期121-123,共3页
GuangZhou Chemical Industry
关键词
埋地管道
泄漏模型
扩散
推导
泄漏流量
buried pipeline
leakage model
diffusion
derivation
leakage flow
