NF EN 6091995 : 1995

Cooperating organizations
National foreword
Foreword
Section One - General
1. Introduction
1.1 General remarks
1.2 Basic statements and assumptions
2. Object and scope
Section Two - Terms, symbols and definitions
3. General
4. List of terms
Section Three - Scale formula, procedure for its
application and loss distribution coefficients
5. General scale formula
6. Procedure of application
6.1 General
6.2 Determination of the basic model data: eta h opt M,
     Reu opt M and delta ref
6.3 Determination of triangle eta h
6.4 Application of the general formula for special
     testing conditions
7. Values for loss distribution coefficients Vref
Section Four - Prototype performance
8. Calculation of prototype performance
8.1 Conversion formulae
Appendix A - Additional comments
A.1 Explanations
A.2 Derivation of the general scale formula
A.3 Relation to the existing IEC Publications 193 and 497
Appendix B - Physical data
B.1 Acceleration due to gravity
B.2 Density of water
B.3 Kinematic viscosity of water
Appendix C - References
Annex ZA - (normative) Other international publications
quoted in this standard with the references of
the relevant European publications
National annex NA (informative) Committees responsible

Deals with the determination of the prototype performance from model acceptance tests of hydraulic machines with consideration of scale effects. Coverage includes the following sections:terms, symbols and definitions; scale formula, procedure for its application and loss distribution coefficients. Also gives detailed diagrams and tables.