發(fā)布時間：2021-11-07 11:22

　　泵站在灌溉、排澇、調水、城市供水、污水排放,保護人民生命財產安全,促進經濟發(fā)展,改善人民生活,建設生態(tài)環(huán)境等方面起著關鍵作用。梯級泵站系統(tǒng)是一套用渠道串聯(lián)起來的泵站梯級,每一梯級泵站由多臺泵機組并聯(lián)組成,.這些泵機組的作用是將水從低處提到高處,并通過渠道輸送到下一梯級泵站。實際泵站-渠道系統(tǒng)中的流動狀態(tài)通常隨時間而變化,因此,流動是瞬變流動。由于瞬變流動參數(shù)隨空間和時間變化,瞬變流分析較恒定流復雜得多。大型梯級泵站系統(tǒng)通常采用渠道輸水,當泵機組開機或停機時,渠道中水流的穩(wěn)態(tài)條件受到干擾,于是產生了瞬變流動,流動參數(shù)在較長時間內一直在變化;此外,瞬變流的水位與泵站運行工況相互影響。因此,情況十分復雜。本文研究了兩級泵站梯形河道內的瞬變流動和泵站運行工況。構建了數(shù)學模型模擬一維非穩(wěn)定漸變的明渠水流,模型除了考慮河道的水力損失外,還考慮了河道的土壤滲漏和水面蒸發(fā)水量損失。提出的模型應用于位于中國江蘇的淮安-淮陰實際泵站系統(tǒng)。主要工作和取得的成果如下:（1）為了求解梯級泵站系統(tǒng)河道瞬變流動,分析比較了 Saint-Venant方程的數(shù)種求解方法,構建了考慮河道水力損失、土壤滲漏和水面蒸發(fā)水量損... 

【文章來源】：揚州大學江蘇省

【文章頁數(shù)】：175 頁

【學位級別】：博士

【文章目錄】：
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


【參考文獻】：
期刊論文
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