水锤特征线方法的一种等时距计算格式

本文推导了压力输水管中一维非恒定水流特征线方程的普遍差分形式;为克服声速变化时,特征线弯曲给计算带来的困难,引用Massau积分法;为更灵活地控制计算时距,采用了任起算点浮动的一种等时距方法;给出了一些边界、间断的处理方法.作为例举,将计算结果与Streeter的试验数据进行了比较.

Equal Time-interval Scheme for Analysis of Waterhammerby Characteristics

The general differencing schemes for characteristics' equations of ID unsteady flow in pressured pipeline are deduced. To overcome the difficulty in calculating the winding characteristic lines when acoustic ve-locity changes, Massau integral technique is used,and to control time-interval flexible,an equal time-interval scheme is adopted, permitting original calculated point shifting. Some methods dealing with boundary and some disconnected are given. As an example,the calculated results are compared with the experimental data3].