基础变量选取对输气管道快瞬变流数值模拟的影响  

Effect of Selection of Basic Parameters on Simulation of Fast Transients in Natural Gas Pipelines

作　　者：丁延鹏[1] 李玉星[1] 付俊涛[1] 郝宏娜[1] 

机构地区：[1]中国石油大学(华东)储运与建筑工程学院,山东青岛266555

出　　处：《石油化工高等学校学报》2011年第3期82-86,94,共6页Journal of Petrochemical Universities

基　　金：教育部新世纪人才支持计划资助(NCET-07-0847);国家自然基金资助(51074175)

摘　　要：依据输气管道快瞬变流数学模型中基础变量(压强p,焓H,密度ρ,熵s和流速u)组合形式的不同,将传统守恒型输气管流模型划分为传统的pρu模型、pHu模型和psu模型,并采用特征线法分别对三种模型进行等价转化及迭代求解。分别采用三种模型对输气管道阀门瞬时开关的室内试验进行模拟分析与结果对比,结果发现计算机运行情况对模拟方程中非独立变量的选择相对不敏感,三种模型比较而言,pHu模型精度较高,并且运行速度较快。Based on different selection of the basic parameters, including pressure （p）, enthalpy （H）, density （ρ）, entropy （s） and flow velocity （u）, the traditional conservative model of gas transmission pipelines was transformed into 3 types： ppu, pHu and psu model. The method of characteristics was adopted to solve the above three model. The fast transient caused by instantly opening and closing valves in the gas transmission experimental pipeline was simulated with the three models respectively. The results show that the simulation process of the gas pipeline is not sensitive to the selection of the basic parameters. Comparatively, the pHu model owned a slice advantage on accuracy and computing speed over the other two models.

关 键 词：输气管道 快瞬变流 变量选取 特征线法 动态模拟 

分 类 号：TQ051.7[化学工程]