论文说明
声明
ABBREVIATIONS
CHAPTER 1 INTRODUCTION
1.1 Overviews
1.2Literature Reviews
1.2.1Flow Measurement Devices
1.2.2Free Overfall Flow Measurement
1.2.3Impacts of Free Overfall
1.2.4Computational Fluid Dynamics
1.3Research Contents and Objectives
CHAPTER 2 MATERIALS AND METHODS
2.1Scenarios and Methodology Framework
2.2U-shaped Sections
2.3Experiment Setup and Procedures
2.4Theoretical Approaches
2.5Numerical Modeling
2.5.1Governing Equations
2.5.2Turbulent-viscosity Model
2.5.3Surfaces Modeling
2.5.4 Meshing
2.5.5Boundary Conductions and Parameter Inputs
CHAPTER 3 HYDRAULIC CHARACTERISTICSOF U-SHAPED CHANNEL FREE OVERFALL
3.1Experiment Results
3.2Model Calibration and Validation
3.3.1Flow Pattern
3.3.2Free Surface Profiles
3.3.3Velocity Distribution
CHAPTER 4 U-SHAPED CHANNEL FREE OVERFALL FLOW MEASUREMENT
4.1.1 Dimensional Analysis
4.1.2 Momentum Theory
4.1.3Weir Flow Theory
4.1.4 Models Comparisons
4.2Supercritical Flow Regime
CHAPTER 5 FREE OVERFALL IMPACTS ON DOWNSTREAM CHANNELAND ENERGY DISSIPATION STRUCTURES
5.1Maximum Pressure on Downstream Channel
5.2Distance from Brink to Waterfall Push Area
5.3Impact Characteristics
5.4Free Overfall Impact Reduction
CHAPTER 6 CONCLUSIONSAND RECOMMENDATIONS
6.1 Conclusions
6.2 Recommendations
参考文献
APPENDICES
致谢
AUTHOR BIOGRAPHY
西北农林科技大学;