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IEC 62097:2019

Hydraulic machines, radial and axial - Methodology for performance transposition from model to prototype

Edition date: 2019-01-08
In Force
Available languages: English, French
Summary: IEC 62097:2019 establishes the prototype hydraulic machine efficiency 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.
This second edition cancels and replaces the first edition published in 2009. This edition constitutes an editorial and technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) In introduction, clarifications have been brought such as addition of a sentence which declares the precedence of IEC 62097 over IEC 60193 if any mismatch is found between them
b) In Clauses 3 and 4, corrections of the typographical errors
c) In Clause 3: changes to be in accordance with presentation of the terms and structure of IEC 60193 (except for the water temperature)
d) In Clause 4:
– Deletion of the clause providing the direct step-up procedures for a whole turbine
– Introduction of a global view by using turbine A and turbine B instead of model turbine, reference model turbine and prototype turbine
– Move of section dealing with “surface roughness of model and prototype” in a new Clause 5
e) In Clause 5:
– Introduction of additional chapters to answer comments raised at the CDV stage and to clarify the subject of surface roughness of model and prototype
– Introduction of new tables for minimum recommended prototype roughness for new radial or diagonal machines and for new axial turbines
– Addition of the explanation about roughness measurement of heavily rusted surface
f) In Clause 7 (former Clause 6):
– Introduction of a new subclause for clarifications about the assumed maximum hydraulic efficiency, hhAmax
– Deletion of the requirement of mutual agreement for the application of the step-up formula for very high efficiency machines exceeding hhAmax
– Clarifications of the equations from 22 to 33 by doubling the equations for suiting the “two step method
g) In Clauses 6 and 7, correction of typographical errors
h) In Clause 8 (former Clause 7), introduction of new figures for clarifying the “2 step” method and the alternative method
i) In Annex A, modification of the flux diagram to be in compliance with IEC 60193
j) In Annex B:
– Correction of the equation to obtain ΔECO
– Deletion of the clause which describes the direct step-up procedures for radial flow machines
k) In Annex C, deletion of the clause which describes the direct step-up procedures for axial flow machines
l) In Annex D:
– notes become main text
– change of variable names in Subclause D.1 for clarifications
m) Addition of Annex E, about comparison of IEC standards dealing with models: 60193 and 62097
n) In Annex F, clarifications of equations by adding more subscripts
o) The Excel sheets attached to the standard are revised as itemized below
– Deletion of the routine regarding the direct step-up procedures for a whole turbine
– Deletion of the notice which requires mutual agreement when the step-up is applied to high efficiency machines exceeding hhAmax
– Addition of the routine to process the normalization of test data obtained at optimum test conditions
p) Simplification of structure, calculation of optimum and individual point, step up calculation with hhAmax
Keywords: Hydraulic Machines, Radial And Axial Performance Transposition.

IEC 62097:2019 s'applique à la vérification du rendement et des performances de machines hydrauliques prototypes à partir des résultats d'essais sur modèle réduit en tenant compte des effets d'échelle y compris de l'effet de rugosité de surface.
Le présent document est prévue pour être employée lors de l'évaluation des résultats des essais contractuels sur modèle réduit de machines hydrauliques.
Cette deuxième édition annule et remplace la première édition parue en 2009. Cette édition constitue une révision éditoriale et technique.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a) En introduction, des clarifications ont été apportées comme l'ajout d'une phrase qui déclare la primauté de la CEI 62097 sur la CEI 60193 en cas de discordance entre les 2 normes
a) Aux Articles 3 et 4, les corrections des erreurs typographiques
b) A l'Article 3 : des modifications rendant conformes la présentation des termes et la structure de ce document avec la CEI 60193 (à l'exception de la température de l'eau)
c) A l'Article 4 :
– La suppression de l’article décrivant la procédure de transposition directe pour la machine hydraulique complète
– L’introduction d'une vision globale en utilisant la notion de turbine A et de turbine B au lieu de turbine modèle, de turbine modèle de référence et de turbine prototype
– Déplacement de la section traitant de "rugosité de surface du modèle et du prototype" dans un nouvel Article 5
d) A l'Article 5 :
– L’introduction de chapitres supplémentaires pour répondre aux commentaires soulevés au stade du CDV et pour clarifier le sujet de la rugosité de surface du modèle et du prototype
– L’introduction de nouveaux tableaux pour la rugosité minimale recommandée du prototype pour les nouvelles machines radiales ou diagonales et pour les nouvelles turbines axiales
– L’ajout d’une explication sur la mesure de la rugosité des surfaces fortement rouillées
e) A l'Article 7 (anciennement Article 6) :
– L’introduction d'un nouveau paragraphe pour clarification à propos du rendement hydraulique maximal supposé, hhAmax
– La suppression de l’agrément mutuel pour l’application de la formule de transposition pour les machines dont le rendement très élevé excède hhAmax
– Des clarifications des équations 22 à 33 en doublant les équations pour correspondre à la "méthode en deux étapes"
f) Aux Articles 6 et 7, les corrections des erreurs typographiques
g) A l'Article 8 (anciennement Article 7), l’introduction de nouveaux indices pour clarifier la méthode "en deux étapes" et la méthode alternative
h) Dans l'Annexe A, la modification du diagramme de flux pour être conforme à l'IEC 60193
i) A l'Annexe B :
– La correction de l'équation pour obtenir ΔECO
– La suppression de l’article décrivant la procédure de transposition directe pour la machine hydraulique complète pour les machines à flux radial
j) A l'Annexe C, la suppression de l’article décrivant la procédure de transposition directe pour la machine hydraulique complète pour les machines à flux axial
k) Dans l'Annexe D :
– Les notes deviennent du texte principal
– Le changement du nom des variables dans le chapitre D.1 pour clarifications
l) Ajout de l'Annexe E, sur la comparaison des normes IEC traitant des modèles: 60193 et 62097
m) Dans l'Annexe F, la clarification des équations en ajoutant des indices supplémentaires
n) Le classeur Excel joint à la norme est révisé comme indiqué ci-dessous :
– La suppression de la routine concernant la procédure de transposition directe pour la machine hydraulique complète
– L’avertissement concernant l’exigence d’agrément mutuel lorsque la transposition s’applique aux machines dont le rendement élevé excède hhAmax
– L’ajout de la routine permettant de calculer la normalisation des mesures obtenues au point d'essai de rendement optimal
o) La simplification de la structure, calcul du point optimal et d’un point individuel, calcul de l’effet d’échelle avec hhAmax
Mots-clés: machines hydrauliques, transposition des performances radiales et axiales

ICS: 27.140-Hydraulic energy engineering
CTN: TC 4 - 1228

Standards Cancellations

Anula a IEC 62097:2009

Otras Relaciones

Acuerdo de Frankfurt EN 62097:2009/FprA1:2018

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