城市配水管网非完全混合与弥散运动水质模型研究

The hypothesis of node transient complete mixing of water quality simulation calculation of water distribution network, and non-diffusion in end-pipe are the potential main reasons that leading to the difference between water quality model predicted value and actual measured value, and widely affect the analysis of water distribution network situation, including the prediction of redidual disinfectant concentration; the optimization of water quality monitoring points; the predictable model of water quality warning system; the numerical simulation of pollution source identification and the quantitative risk assessment. Computational fluid dynamics and experiment simulation method would be used in this research. Also using node water component mixing behavior and end-pipe diffusion as researching objects to calculate, simulate and analyze, with the purpose of revealing the responding relationship between node output water quality component concentration and input water quality component concentration; forming node non-uniform mixing theory, clarifying the node mixing order of water component in distribution network; establishing node non-uniform mixing theory and diffusion model, then establishing water quality calculation model of water distribution network in further. This research is based on fluid dynamics to elucidate the basic physical principles of node mixing behavior and end-pipe diffusion behavior, to establish its mathematical model and calculation method, in order to provide new breakthrough and new progress of water quality modeling theory of water distribution network.

配水管网水质工况模拟计算中节点瞬时完全混合的假设与管网末梢没有任何弥散扩散是引起水质模型预测值和实际测量值差异的潜在重要原因，广泛影响配水管网工况计算分析，包括残留消毒剂浓度预测，水质监测点优化定位，水质安全预警系统预测模型，污染源识别的数值模拟和风险定量评估。本研究拟采用计算流体力学和实验模拟方法，以节点处水质组分混合行为与管网末梢弥散扩散为研究对象，对其进行计算、模拟及实验分析，揭示节点出流水质组分浓度与入流浓度响应关系，形成节点非均匀混合理论，阐明管网中水质组分在节点处混合规律，建立节点非均匀混合理论与弥散扩散模型，进而建立配水管网水质计算模型。研究从流体力学的角度阐明节点处混合行为与管网末梢弥散扩散行为的基本物理原理，建立其数学模型和计算模拟方法，为配水管网水质建模理论提供新突破和新进展。

配水管网水质工况模拟计算节点瞬时完全混合与管网末梢没有任何弥散扩散的假设是引起水质模型预测值和实际测量值差异的重要原因。这广泛影响配水管网工况计算分析，包括残留消毒剂浓度预测，水质监测点优化定位，水质安全预警系统预测模型，污染源识别的数值模拟和风险定量评估。本项目采用了计算流体力学和实验模拟方法，以节点处水质组分混合行为与管网末梢弥散扩散为研究对象，对其进行计算、模拟及实验分析，揭示节点出流水质组分浓度与入流浓度响应关系，形成节点非均匀混合理论，阐明管网中水质计算模型。研究了从流体力学的角度阐明节点处混合行为与管网末梢弥散扩散行为的基础物理原理，建立了数学模型和计算模拟方法，为配水管网水质建模理论提供新突破新进展。