高温气冷堆蒸汽发生器中的热流固耦合

发布时间：2021-04-11 16:54

　　蒸汽发生器（SG）是任何发电厂中最重要的组成部分之一。基本上它起到了热交换器的作用,将来自反应堆堆芯的冷却剂的热量传递到给水中,然后将给水转化为水蒸汽。产生的水蒸汽将带动涡轮机做功。SG的作用是至关重要,因为它有助于调节反应堆内的温度。SG的失效将会导致非常危险的情况,从而导致非常严重的事故。SG的建模需要非常仔细的分析,在设计时也必须注意,以确保工厂的安全性和可靠性。在SG的设计中,运行工况下的温度、压力、转速等是影响SG性能的重要因素。此外,还必须对SG内部的应力、应变和变形等静力结构分析进行分析。了解在压力下或正常条件下变形的区域是非常重要的,因为这些区域可能由于疲劳而发生裂纹。为了更好、更快、优化蒸汽发生器的设计决策以及冷却剂和材料的选择,就需要进行这样的分析。因此,在SG上应用了先进的数值模拟方法,以确保SG在正常工作条件下的性能。本文研究的目的是对我国实验高温气冷堆（HTGR-10）的蒸汽发生器进行热流固耦合分析。对蒸汽发生器进行了建模,并对其进行了边界条件和结构分析。蒸汽发生器是电厂系统的重要组成部分,是保证电厂安全、高效运行的关键部件。为了预测蒸汽发生器管内的热分布,必... 

【文章来源】：华北电力大学(北京)北京市 211工程院校 教育部直属院校

【文章页数】：67 页

【学位级别】：硕士

【文章目录】：
摘要
ABSTRACT
CHAPTER 1. INTRODUCTION
    1.1 RESEARCH SIGNIFICANCE AND BACKGROUND
    1.2 LITERATURE REVIEW
    1.3 RESEARCH METHODOLOGY
    1.4 CHRONOLOGY OF RESEARCH
    1.5 ORGANIZATION OF THE THESIS
CHAPTER 2. STEAM GENERATOR OF HTGR-10
    2.1 BRIEF INTRODUCTION OF HTGR-10
    2.2 INTRODUCTION TO STEAM GENERATOR
        2.2.1 Types of steam generators
        2.2.2 Heat Transfer Phenomena in Steam Generator
        2.2.3 Factors Affecting Rate of Heat Transfer in a Steam Generator
    2.3 HELICALLY COILED STEAM GENERATOR OF HTGR-10
        2.3.1 Terminology of helically coiled tubes
        2.3.2 Secondary flow and laminar to turbulent transition in helical tube
CHAPTER 3. COMPUTATIONAL FLUID DYNAMICS:BACKGROUNDAND METHODOLOGY
    3.1 COMPUTATIONAL FLUID DYNAMICS
    3.2 ADVANTAGES OF CFD
    3.3 CONCEPT OF CFD
    3.4 PERFORMING A CFD ANALYSIS
        3.4.1 Pre-rocessing
        3.4.2 Processing
        3.4.3 Post-processing
    3.5 PROBLEM-SOLVING WITH CFD
    3.6 CFD GOVERNING EQUATIONS
        3.6.1 Conservation Equations
        3.6.2 Equation of State
        3.6.3 Newton's Law of Viscosity （empirical relation for viscosity μ）
        3.6.4 Fourier's Second Law of Thermodynamics (empirical relation forthermal conductivity k
        3.6.5 General Transport Equation
        3.6.6 （RANS）Equations
    3.7 TURBULENCE MODELLING
    3.8 FINITE VOLUME METHOD
    3.9 DIFFERENCING SCHEMES
        3.9.1 Central Differencing Scheme
        3.9.2 Upwind Differencing Scheme
CHAPTER 4. COMPUTATIONAL FLUID DYNAMICS:MODELINGAND SIMULATION
    4.1 WORK ORDER IN ANSYS FLUENT
    4.2 MODEL BUILDING OF A STEAM GENERATOR
    4.3 MESHING
        4.3.1 Mesh Quality
    4.4 FLUENT SETUP
        4.4.1 Fluid Domain Setup
        4.4.2 Solid Domain Setup
    4.5 RESULTS
CHAPTER 5. FINITE ELEMENT ANALYSIS:THEORY AND RESULTS
    5.1 FINITE ELEMENT ANALYSIS
    5.2 STEPS FOR FEM
    5.3 STRESS SINGULARITY
    5.4 FEM ANALYSIS
        5.4.1 Building the model
        5.4.2 Material properties
        5.4.3 Boundary conditions and loads
    5.5 ANALYSIS SETTINGS
    5.6 RESULTS
CHAPTER 6. CONCLUSION AND FUTURE RECOMMENDATIONS
    6.1 CONCLUSION
    6.2 FUTURE RECOMMENDATIONS
REFERENCES
ACKNOWLEDGEMENTS
PUBLICATIONS


【参考文献】：
期刊论文
[1]Two Phase Flow Stability in the HTR-10 Steam Generator[J]. 居怀明,左开芬,刘志勇,徐元辉.  Tsinghua Science and Technology. 2001(01)



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