![header thumbnail](/images/img-default-logo.png)
EN 62097:2009
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
View Superseded by
![header thumbnail](/images/img-default-logo.png)
Hydraulic machines, radial and axial - Performance conversion method from model to prototype
10-02-2022
14-05-2009
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
Access your standards online with a subscription
Features
-
Simple online access to standards, technical information and regulations.
-
Critical updates of standards and customisable alerts and notifications.
-
Multi-user online standards collection: secure, flexible and cost effective.