BS EN 62097:2009 Hydraulic machines, radial and axial. Performance conversion method from model to prototype
BS EN 62097 establishes the prototype hydraulic machine efficiency from model test results, with consideration of scale effect including the effect of surface roughness. Advances in the technology of hydraulic turbo-machines used for hydroelectric power plants indicate the necessity of revising the scale effect formula given BS EN IEC 60193.
BS EN 62097 applies to the assessment of the efficiency and performance of prototype hydraulic machine from model test results, with consideration of scale effect including the effect of surface roughness. This standard is intended to be used for the assessment of the results of contractual model tests of hydraulic machines.
Contents of BS EN 62097:
- Introduction
- Scope
- Normative references
- Terms, definitions, symbols and units
- System of units
- List of terms
- Subscripts’ list
- Terms, definitions, symbols and units
- Scale-effect formula
- General
- Scalable losses
- Basic formulae of the scale effect on hydrodynamic friction losses
- Specific hydraulic energy efficiency
- Step-up formula
- Roughness of model and prototype
- Direct step-up for a whole turbine
- Power efficiency (disc friction)
- Step-up formula
- Roughness of model and prototype
- Volumetric efficiency
- Standardized values of scalable losses and pertinent parameters
- General
- Specific speed
- Parameters for specific hydraulic energy efficiency step-up
- Parameters for power efficiency (disc friction) step-up
- Calculation of prototype performance
- General
- Hydraulic efficiency
- Specific hydraulic energy
- Discharge
- Torque
- Power
- Required input data
- Calculation procedure
- Basic formulae and their approximation
- Scale effect on specific hydraulic energy losses of radial flow machines
- Scale effect on specific hydraulic energy losses of axial flow machines [10]
- Scale effect on disc friction loss
- Leakage loss evaluation for non homologous seals
- Bibliography