Operation of Step Pumping Station System Based on Open Chann

发布时间：2021-11-07 11:22

　　泵站在灌溉、排涝、调水、城市供水、污水排放,保护人民生命财产安全,促进经济发展,改善人民生活,建设生态环境等方面起着关键作用。梯级泵站系统是一套用渠道串联起来的泵站梯级,每一梯级泵站由多台泵机组并联组成,.这些泵机组的作用是将水从低处提到高处,并通过渠道输送到下一梯级泵站。实际泵站-渠道系统中的流动状态通常随时间而变化,因此,流动是瞬变流动。由于瞬变流动参数随空间和时间变化,瞬变流分析较恒定流复杂得多。大型梯级泵站系统通常采用渠道输水,当泵机组开机或停机时,渠道中水流的稳态条件受到干扰,于是产生了瞬变流动,流动参数在较长时间内一直在变化;此外,瞬变流的水位与泵站运行工况相互影响。因此,情况十分复杂。本文研究了两级泵站梯形河道内的瞬变流动和泵站运行工况。构建了数学模型模拟一维非稳定渐变的明渠水流,模型除了考虑河道的水力损失外,还考虑了河道的土壤渗漏和水面蒸发水量损失。提出的模型应用于位于中国江苏的淮安-淮阴实际泵站系统。主要工作和取得的成果如下:（1）为了求解梯级泵站系统河道瞬变流动,分析比较了 Saint-Venant方程的数种求解方法,构建了考虑河道水力损失、土壤渗漏和水面蒸发水量损... 

【文章来源】：扬州大学江苏省

【文章页数】：175 页

【学位级别】：博士

【文章目录】：
Abstract
摘要
Abbreviations & Symbols
Chapter 1 Introduction
    1.1 Overview
    1.2 Pumping station and its performances
        1.2.1 Pump performance parameters
        1.2.2 Pump performance curves
        1.2.3 Pumping station and pumping station performances
    1.3 Types of channels and flow classification
        1.3.1 Section elements
        1.3.2 Velocity distribution
        1.3.3 Flow classification
    1.4 Literature review
        1.4.1 Back ground of the case study
        1.4.2 Developments in hydraulic transients
        1.4.3 Saint-Venant equations methods of solution and applications
    1.5 Research objectives
    1.6 Summary
Chapter 2 Operation of step pumping station system based on open channel stable flow
    2.1 Introduction
    2.2 Operation mode point of a pumping station
    2.3 Water loss along the channel
        2.3.1 Evaporation loss
        2.3.2 Seepage loss
    2.4 Operation modes of step pumping station system based on stable flow
    2.5 Summary
Chapter 3 Transient flow equations and numerical methods for open channel
    3.1 Introduction
    3.2 Reynolds transport theorem
    3.3 Governing equations for one-dimensional flow
        3.3.1 Continuity equation
        3.3.2 Momentum equation
        3.3.3 Classification of governing equations
        3.3.4 Integral forms
    3.4 Wave propagation
        3.4.1 Waves classifications
        3.4.2 Wave celerity and absolute wave velocity
    3.5 Method of characteristics
    3.6 Finite-difference method
        3.6.1 Explicit finite-differences
        3.6.2 Implicit finite-differences
        3.6.3 Explicit finite-difference schemes
        3.6.4 Stability Conditions
        3.6.5 Comparison of finite-difference methods
    3.7 Other numerical methods
    3.8 Comparison of numerical methods
    3.9 Summary
Chapter 4 Transient flow in an open channel between two step pumping stations and theiroperation modes
    4.1 Introduction
    4.2 Two step pumping station system
    4.3 Mathematical model
    4.4 Boundary conditions and initial conditions
    4.5 Finite-difference method (Lax diffusive scheme)
    4.6 Case study
    4.7 Results and discussion
        4.7.1 Grid number test and computational accuracy
        4.7.2 Water surface elevation along the channel
        4.7.3 Flow rate along the channel
        4.7.4 Lateral outflow per unit length along the channel
        4.7.5 Transient flow formation mechanism-wave propagation mechanism
    4.8 Summary
Chapter 5 Effect of pumping station operation modes and channel length on transient flowbetween two step pumping stations
    5.1 Introduction
    5.2 Boundary conditions and initial conditions
    5.3 Case Study
        5.3.1 The pumping station operation mode
        5.3.2 The channel length
    5.4 Results and discussion
        5.4.1 The pumping station operation mode effect
        5.4.2 The channel length effect
    5.5 Summary
Chapter 6 Transient flow in an open channel between two step pumping stations underabnormal situations and its application
    6.1 Introduction
    6.2 Initial conditions
        6.2.1 When pumping stations starting-up
        6.2.2 When pumping stations at steady operation state
    6.3 Boundary conditions
        6.3.1 Lateral outflow
        6.3.2 Discharges of two pumping stations
    6.4 Case study
        6.4.1 Project basic information
        6.4.2 Situations when pump units starting-up abnormally
        6.4.3 Situations when pump units shutting-down abnormally
    6.5 Results and discussion
        6.5.1 Abnormal situation Ⅰ
        6.5.2 Abnormal situation Ⅱ
        6.5.3 Abnormal situation Ⅲ
        6.5.4 Abnormal situation Ⅳ
        6.5.5 Abnormal situation Ⅴ
        6.5.6 Abnormal situation Ⅵ
        6.5.7 Abnormal situation Ⅶ
        6.5.8 Abnormal situation Ⅷ
        6.5.9 Comparison between different abnormal situations and rush-repair time
    6.6 Summary
Chapter 7 Conclusions and future works
    7.1 Conclusions
    7.2 Future work
References
Acknowledgements
Scientific research projects participated and scientific research achievements


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期刊论文
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