灌溉管网非恒定流计算机实现方法

为了研究灌溉管网非恒定流计算机实现方法,基于非恒定流的基本原理及其特征线(MOC)解法,探讨了采用节支关联表和支节关联表建立管网结构信息,并对管网数据进行储存、计算和结果输出的方法,在计算过程中通过数组储存不同的节点类型及管网参数供计算机调用。通过实例对典型喷灌管网的非恒定流过程进行了计算并分析。结果表明,该方法储存管网结构信息简单方便,计算机能够快速识别节点类型并调用相应的边界条件子程序,本方法可用于复杂灌溉管网的非恒定流建模与分析。

Simulating Unsteady Flow in Irrigation Pipe Network

A computer model for simulating unsteady flow in irrigation pipe network was presented in this paper based on the characteristic line (MOC) method. The method established the pipe network structure using branch-node association and node-branch association tables. We discussed how to store, calculate the pipe network data. In the calculation, different types of nodes and pipe network parameters were stored by arrays. As an example, we took the pipe network in spring irrigation and calculated and analyzed the unsteady flow within it. The results showed that the method for storing the pipe network was simple and convenient, and the node types could be iden-tified quickly in calling the subroutine for the boundary condition. The model can be used to simulate and analyze unsteady flow in complicated irrigation pipe network.