Turbine Steam Path, Volume IIIa Mechanical Design and Manufacture

Content: Machine generated contents note: List of Acronyms --
Foreword --
Preface --
Acknowledgements --
Chapter 1-Considerations of a Turbine Steam --
Path Maintenance Strategy --
Introduction --
Considerations Relating to a Maintenance Strategy --
The Turbine Outage --
Establishing the Need for Unit Shutdown --
Outage Scheduling --
Interval Between Maintenance Outages --
The Inspection/Maintenance Outage --
The Available Corrective Options --
Distinction Between Causes and Mechanisms of Failure --
Component Susceptibility for Deterioration --
Instantaneous Damage or Failure --
Factors Contributing to Gradual Deterioration --
Monitoring Damage and Deterioration --
Replacement Parts Strategy and Supply --
References --
Chapter 2-Steam Path Component Alignment --
and Stage Spatial Requirements --
Introduction --
Predictable Factors Affecting Design Clearance --
Rotor Vertical Deflection --
Differential Expansion --
Radial Expansion of the Steam Path Parts --
Diaphragm Deflection at Pressure and Temperature --
Unit \"End-to-End\" Lateral Alignment --
Methods of Field Alignment --
Unpredictable Factors Affecting Design Clearance --
Steam Path Area Requirements --
The Stage Operating Definition --
Steam Path Component Arrangement (Axial/Radial Direction) --
Blade Vane and Cascade Geometry --
The Effect of Vane Placement Errors --
References --
Chapter 3-Steam Path Damage --
Induced by Water --
Introduction --
Water Condensation in Expanding Steam --
Radial Distribution of Moisture --
Moisture Deposition --
Measuring Moisture Distribution and Content --
Water Removal from the Steam Path --
Moisture-induced Damage --
Moisture-impact Erosion --
Blade-trailing Edge Erosion --
Wire-drawing Erosion --
Water-washing Erosion --
Water Ingestion into the Steam Path --
References --
Chapter 4-Operational Events --
Giving Rise to Steam Path Damage --
Introduction --
Foreign Object Impact Damage --
Sources of the Impacting Objects --
Impact Damage Classification --
Solid-particle Erosion (Abrasion) --
Scale Formation --
The Erosion Mechanisms --
Material Loss Patterns Due to SPE --
Protective Measures Against Erosion --
SPE Influence on Stage Performance --
Steam Path Component Rubbing --
Fretting Corrosion --
References --
Chapter 5-Steam Path Damage --
and Deterioration from Material --
Property Degradation --
Introduction --
Considerations of Material Structure --
High-temperature Creep --
Creep Deformation --
The Creep Mechanism --
Creep Rate --
Creep in Steam Path Components --
High-cycle Fatigue --
Tlhe High-cycle Phenomena --
Rotating Blade Vibratory Stresses --
Material Properties --
Fatigue Stresses and their Representation --
Crack Growth --
HCF Failure Surface Appearance --
Creep Fatigue --
Temper Embrittlement --
Low-cycle Thermal Fatigue --
Thermal Transients --
Determination of Thermal Stresses --
Components Operating at High Temperature --
References --
Chapter 6 --
Steam Path Damage and Deterioration from --
the Deposition of Contaminants --
Introduction --
Source of Steam Path Impurities --
The Composition of Deposits --
The Removal of Chemical Deposits from the Steam Path --
Steam Path Cleaning Methods --
Deposition Patterns --
Steam Path Efficiency Deterioration --
Steam Path Corrosion --
Forms of the Corrosion Process --
References.