摘要
为了应对水资源危机,中国大力推广低压管灌技术用于粮食作物的灌溉.基于水量平衡和能量守恒原理,以系统的水量偏差最小为目标函数,支管的能量守恒和水量平衡作为约束条件,支管进口流量为决策变量,建立了低压管道输水灌溉系统的一维恒定流水力模拟模型,并相应地提出了试算-粒子群算法(TPSA)进行求解,可以获得系统实际运行时水泵的工况点以及各级管道和出水口的实际流量.将该方法应用于上海市一灌区的低压管灌系统,对比了TPSA与梯度法的求解结果,证明在同时工作的支管数较多的情况下TPSA可以获得更佳的求解结果,误差最多可减小12.3%,耗时最多可减少16.3%.应用该方法可以对管灌系统的初步设计成果进行校核和调整,对提高设计可靠性具有一定作用.
The technology of pressurized irrigation with branched networks is promoted on a large scale to alleviate water crisis in China.Continuity equation and energy equation are the basis of hydraulic simulation of pipeline irrigation.In order to simulate the hydraulic performance of pumping station pressurized irrigation projects with low-pressure pipe conveyance,the idea of system optimization is used to develop a mathematical model.In the model,the objective function is to minimize the system′s deviation of water volume and constraints include energy equations of branch pipes.A trial-particle swarm algorithm is proposed to solve the model,which can obtain the actual working points of pumps and the actual discharges of the pipelines and their outlets during the operation of the system.The method was applied to a low-pressure pipe irrigation system in Shanghai and results were compared with those of gradient method.It is proved that TPSA can reduce solving error by 12.3%and solving time by 16.3%at most.The proposed method may help to check the design results of pipe irrigation system,which can meet the development needs of irrigation projects with low-pressure pipe conveyance in China at present.
作者
龚志浩
蒋晓红
GONG Zhihao;JIANG Xiaohong(College of Hydraulic Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225009, China)
出处
《排灌机械工程学报》
CSCD
北大核心
2021年第10期1046-1050,共5页
Journal of Drainage and Irrigation Machinery Engineering
基金
江苏省水利科技项目(2018045,2018062)
江苏省研究生科研创新计划项目(KYCX19_2105)。
关键词
低压管灌
水力计算
水量平衡
能量守恒
试算
粒子群算法
low-pressurized pipe irrigation
hydraulic calculation
water balance
energy conservation
trial
particle swarm algorithm
