| 摘要 | 第5-6页 |
| Abstract | 第6页 |
| Chapter 1 Introduction | 第9-17页 |
| 1.1 Research background and significance | 第9-11页 |
| 1.2 Research Status and Progress of Draft Tube of Hydraulic Turbine | 第11-14页 |
| 1.2.1 Research methods of draft tube of hydraulic turbine | 第11-12页 |
| 1.2.2 Research status of flow field in draft tube of hydraulic turbine | 第12-14页 |
| 1.3 The main research content | 第14-17页 |
| Chapter 2 Numerical Simulation Analysis Method Based on Computational Fluid Dynamics | 第17-23页 |
| 2.1 Overview of computational fluid dynamics (CFD) | 第17页 |
| 2.2 Control equations and discretization methods of fluid flow | 第17-23页 |
| 2.2.1 Control equations of fluid flow | 第17-18页 |
| 2.2.2 Discretization methods of control equations | 第18-23页 |
| Chapter 3 Geometric Model and Mesh Generation for Draft Tube Hydraulic Turbine | 第23-35页 |
| 3.1 Geometric model | 第23-27页 |
| 3.1.1 Pro/ Engineer Software introduction | 第23页 |
| 3.1.2 Establish the geometric model of draft tube | 第23-27页 |
| 3.2 Draft tube generate mesh | 第27-30页 |
| 3.2.1 ICEM CFD Introduction | 第27页 |
| 3.2.2 Features of ICEM | 第27页 |
| 3.2.3 Types of mesh | 第27-28页 |
| 3.2.4 Principle of generate mesh | 第28-29页 |
| 3.2.5 Division mesh of draft tube | 第29-30页 |
| 3.3 Study on optimization of draft tube | 第30-35页 |
| 3.3.1 Modification the angle roof of diffuser section | 第30-34页 |
| 3.3.2 Modification the height of straight cone section | 第34-35页 |
| Chapter 4 Analysis Internal Flow Field of Draft Tube | 第35-57页 |
| 4.1 Analysis of steady flow before and after optimization the draft tube .. | 第36-57页 |
| 4.1.1 Analysis and comparison under design condition | 第36-43页 |
| 4.1.2 A analysis and comparison under large flow condition | 第43-49页 |
| 4.1.3 Analysis and comparison under small flow condition | 第49-57页 |
| Chapter 5 Conclusion and Expectations | 第57-59页 |
| 5.1 Conclusions | 第57-58页 |
| 5.2 Expectations | 第58-59页 |
| Acknowledgements | 第59-61页 |
| References | 第61-67页 |
| List of Publications | 第67页 |
