输气管道稳态计算公式改进研究  

IMPROVED STEADY STATE FORMULA FOR GAS PIPELINE

作　　者：李长俊[1] 南发学[2] 亢春[2] 

机构地区：[1]西南石油大学石油工程学院,四川成都610500 [2]中国石油塔里木油田,新疆库尔勒841000

出　　处：《西南石油大学学报（自然科学版）》2008年第5期155-157,共3页Journal of Southwest Petroleum University(Science & Technology Edition)

基　　金：四川省重点学科建设项目(SZD0416)

摘　　要：输气管道工艺计算稳态公式在管道设计和管理过程中起着十分重要的作用。针对目前我国有关规范中常用稳态计算公式忽略了流速变化所带来的影响,适用范围受到限制的实际,根据天然气管道中气体流动质量和动量守衡定律,得到了管道两端压力和流量变化的解析式,该解析式既考虑了地形起伏的影响,又考虑了流速变化的影响,从而提高了计算精度,扩大了适用范围。由于地形起伏稳态计算公式是隐式形式,为了进行实际应用,开发出了计算机程序。应用分析表明,当管道两端压差较大时,应该考虑管道中气流速度变化的影响,同时增加管道上端压力或降低管道下端压力不一定能提高管道中的气量。Gas pipeline steady state formula is very useful in pipeline design and management.Currently,the application scope of gas pipeline steady state formula in China is limited because of kinetic energy term being neglected.Based on the mass and momentum balance of gas motion in pipeline,a rigorous analytical equation is derived for gas pipeline between flow rate,inlet pressure and outlet pressure.This equation takes both elevation change and kinetic energy term into account,and hence makes calculating precision higher and application scope wider.Because of steady state formula for elevation change is implicit,computer programs are developed to handle applications.The applications and analysis show that while pressure difference between two ends of pipeline is larger,the kinetic energy term should be considered in the formula;and while inlet pressure increases and outlet pressure decreases,the flow rate may not be increase.

关 键 词：管道 天然气 稳态 数学模型 公式 

分 类 号：TE832.3[石油与天然气工程—油气储运工程]