变时步的特征线法计算复杂输水系统的水力过渡过程  

Calculations of Hydraulic Transient for Complex Water Supply Systems by Using Characteristic Method with Variable Time Steps

作　　者：练继建[1] 王俊[1] 万五一[1] 王云仓[1] 

机构地区：[1]天津大学建筑工程学院,天津300072

出　　处：《水利水电技术》2003年第9期12-14,共3页Water Resources and Hydropower Engineering

摘　　要：建立了明渠—管道—明渠复杂输水系统的瞬变流计算模型.与以往不同,在用特征线法进行数值计算时,对管道和明渠分别采用不同的时间步长,用线性插值法处理明渠与管道相接处的内边界.这种变时步的处理方法与采用相同时步的方法相比,具有计算量小、易于编程的优点,能够更好地模拟实际工程中的水力过渡过程.The authors set up a mathematical model to simulate the transient flow in a complex water supply system consisting of open channel:pipe:open channel. A characteristic method with variable time steps was adopted to calculate the free surface and pressure flow. Different time steps were used for the open channel flow and pipe flow. The time step at the interior boundary was determined by linear interpolation. The computational time was saved greatly compared with the method of constant time step. The method presented here was convenient for programming and could simulate hydraulic transients in a complex water supply system satisfactorily for practical engineering projects.

关 键 词：特征线法 明渠 有压管道 时间步长 

分 类 号：TV67[水利工程—水利水电工程]