Application of Method-of-Lines to Charging-Up Process in Pipelines with Entrapped Air

被引：5

作者：

张永良 ^{[1
]}

K.Vairavamoorthy ^{[2
]}

机构：

[1] State Key Laboratory of Hydroscience and Hydraulic Engineering, Department of Hydraulic Engineering, Tsinghua University, Beijing 100084,China

[2] Department of Civil and Building Engineering, Loughborough University, Leicestershire LE11 3TU,UK

来源：

Tsinghua Science and Technology | 2006年 / 03期

关键词：

transient flow; charging-up process; pipelines; entrapped air; method of lines;

D O I：

暂无

中图分类号：

O359 [多相流];

学科分类号：

080704 ;

摘要：

A mathematical model is presented for the charging-up process in an air-entrapped pipeline with moving boundary conditions. A coordinate transformation technique is employed to reduce fluid motion in time-dependent domains to ones in time-independent domains. The nonlinear hyperbolic partial differential equations governing the unsteady motion of fluid combined with an equation for transient shear stress be-tween the pipe wall and the flowing fluid are solved by the method of lines. Results show that ignoring elas-tic effects overestimates the maximum pressure and underestimates the maximum front velocity of filling fluid. The peak pressure of the entrapped air is sensitive to the length of the initial entrapped air pocket.

引用

页码：324 / 331

页数：8