EN 62097:2009

INTRODUCTION
1 Scope
2 Normative references
3 Terms, definitions, symbols and units
  3.1 System of units
  3.2 List of terms
      3.2.1 Subscripts' list
      3.2.2 Terms, definitions, symbols and units
4 Scale-effect formula
  4.1 General
      4.1.1 Scalable losses
      4.1.2 Basic formulae of the scale effect on hydrodynamic
            friction losses
  4.2 Specific hydraulic energy efficiency
      4.2.1 Step-up formula
      4.2.2 Roughness of model and prototype
      4.2.3 Direct step-up for a whole turbine
  4.3 Power efficiency (disc friction)
      4.3.1 Step-up formula
      4.3.2 Roughness of model and prototype
  4.4 Volumetric efficiency
5 Standardized values of scalable losses and pertinent
  parameters
  5.1 General
  5.2 Specific speed
  5.3 Parameters for specific hydraulic energy efficiency
      step-up
  5.4 Parameters for power efficiency (disc friction) step-up
6 Calculation of prototype performance
  6.1 General
  6.2 Hydraulic efficiency
  6.3 Specific hydraulic energy
  6.4 Discharge
  6.5 Torque
  6.6 Power
  6.7 Required input data
7 Calculation procedure
Annex A (informative) - Basic formulae and their approximation
Annex B (informative) - Scale effect on specific hydraulic
        energy losses of radial flow machines
Annex C (informative) - Scale effect on specific hydraulic
        energy losses of axial flow machines [10]
Annex D (informative) - Scale effect on disc friction loss
Annex E (informative) - Leakage loss evaluation for non
        homologous seals
Bibliography
Annex ZA (normative) - Normative references to international
         publications with their corresponding European
         publications

IEC 62097:2009 is applicable 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 document is intended to be used for the assessment of the results of contractual model tests of hydraulic machines.