1.1 Based upon the geometrically similar requirement for the model and prototype hydraulic turbine, the standard specifies the precision and water passage components surface quality of the prototype water passage components of hydraulic turbine to the hydraulic performance.
1.2 This standard is applicable to Francis turbine, axialflow turbine, mixed flow variable pitch turbine and pelton turbine. Throughflow turbine, angular impulse turbine and pump turbine can consult to this standard.
Foreword
1. Scope
2. Normative References
3. Definitions
4. Composition of water passage components
5. Similarity relationships
5.1 Prototype and model geometrically similar to each other
5.2 Dimensional variation system
6. Technical requirements for geometric similarity of pressure turbine prototype and model
6.1 Spiral casing
6.2 Seating ring
6.3 Guide vane
6.4 Guide vane profile
6. 5 Seal clearance
6.6 Francis wheel
6.7 Axialflow runner
7. Technical requirements for prototype and model geometric similarity of pelton turbine
7.1 Muzzle and nozzle needle
7.2 Runner
8. Surface roughnesses of the water passage components
