【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.更多还原

【Abstract】 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.更多还原