Nomenclature
Chapter 1 Introduction
1.1 The hydropower
1.2 Intrinsic Low-Frequency Excitations of Hydropower Generation
1.2.1 Description of the draft tube flow
1.2.2 Flow asymmetry and coupling with Low-frequency pressure pulsations
1.3 Remedial attempts to counteract low-frequency excitations of hydropower
1.3.1 Structural passive methods
1.3.2 Ancillary fluid injection
1.4 Research Objectives
1.5 Thesis organization
Chapter 2 Numerical simulation research methodology
2.1 Navier-Stokes Equations
2.1.1 Reynolds-averaged Navier-Stokes equations (RANS)
2.2 Turbulence Closure modelling
2.2.1 Eddy Viscosity Turbulence model
2.2.2 Boundary layer Modelling
2.3 The solver, discretization and boundary conditions
2.4 Summary
Chapter 3 Description of Driving Inlet and Core Instabilities of the Draft tube Flow
3.1 Introduction
3. 2 Geometric model and numerical approach
3.2.1 Geometric model
3.2.2. Numerical Method
3.3 Results and analysis
3.3.1 Admission instabilities of the draft tube cone
3.5 Summary
Chapter 4 Part-load Outlying Instabilities in a Francis Turbine Draft Tube
4.1 Introduction
4. 2 Investigation methodology
4.3 Results and discussion
4.3.1 Geometric model and numerical approach validation
4.3.2 The optimal stability of the outlying zone
4.3.3 Wall-bounded instabilities under part load operation
4.4 Summary
Chapter 5 Mutual Influences Between the Draft tube and Upstream components
5.1 Introduction
5.2 Investigation methodology
5.2.1 Numerical model and spatial discretization
5.2.2 Boundary Conditions and Solution Set-up
5.3 Results and discussion
5.3.1 Recommended operations in the BEP neighborhood
5.3.2 Part-load operations
5.4 Summary
Conclusions
Novelty
Future works
参考文献
Papers published during the Ph.D. education
声明
致谢
Curriculum Vitae
哈尔滨工业大学;
