IEC_TR_61400-12-4-2020.pdf

IEC TR 61400-12-4 Edition 1.0 2020-09 TECHNICAL REPORT Wind energy generation systems Part 12-4:Numerical site calibration for power performance testing of wind turbines IEC TR 61400-12-4:2020-09(en)THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2020 IEC,Geneva,Switzerland All rights reserved.Unless otherwise specified,no part of this publication may be reproduced or utilized in any form or by any means,electronic or mechanical,including photocopying and microfilm,without permission in writing from either IEC or IECs member National Committee in the country of the requester.If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication,please contact the address below or your local IEC member National Committee for further information.IEC Central Office Tel.:+41 22 919 02 11 3,rue de Varemb infoiec.ch CH-1211 Geneva 20 www.iec.ch Switzerland About the IEC The International Electrotechnical Commission(IEC)is the leading global organization that prepares and publishes International Standards for all electrical,electronic and related technologies.About IEC publications The technical content of IEC publications is kept under constant review by the IEC.Please make sure that you have the latest edition,a corrigendum or an amendment might have been published.IEC publications search-webstore.iec.ch/advsearchform The advanced search enables to find IEC publications by a variety of criteria(reference number,text,technical committee,).It also gives information on projects,replaced and withdrawn publications.IEC Just Published-webstore.iec.ch/justpublished Stay up to date on all new IEC publications.Just Published details all new publications released.Available online and once a month by email.IEC Customer Service Centre-webstore.iec.ch/csc If you wish to give us your feedback on this publication or need further assistance,please contact the Customer Service Centre:salesiec.ch.Electropedia-www.electropedia.org The worlds leading online dictionary on electrotechnology,containing more than 22 000 terminological entries in English and French,with equivalent terms in 16 additional languages.Also known as the International Electrotechnical Vocabulary(IEV)online.IEC Glossary-std.iec.ch/glossary 67 000 electrotechnical terminology entries in English and French extracted from the Terms and Definitions clause of IEC publications issued since 2002.Some entries have been collected from earlier publications of IEC TC 37,77,86 and CISPR.IEC TR 61400-12-4 Edition 1.0 2020-09 TECHNICAL REPORT Wind energy generation systems Part 12-4:Numerical site calibration for power performance testing of wind turbines INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 27.180 ISBN 978-2-8322-8781-1 Registered trademark of the International Electrotechnical Commission Warning!Make sure that you obtained this publication from an authorized distributor.2 IEC TR 61400-12-4:2020 IEC 2020 CONTENTS FOREWORD.4 INTRODUCTION.6 1 Scope.7 2 Normative references.7 3 Terms,definitions,abbreviations and symbols.7 3.1 Abbreviations.7 3.2 Symbols and units.8 4 Overview of Numerical Flow Simulation Approaches.10 4.1 Linear Flow Models.10 4.2 Reynolds-averaged Navier-Stokes(RANS)Models.11 4.3 Large Eddy Simulation(LES)and Hybrid RANS/LES Models.12 5 Existing Guidelines for Numerical Flow Modelling Applications.13 5.1 General.13 5.2 AIAA(1998)Guide for the Verification and Validation of Computational Fluid Dynamics Simulations.14 5.3 Standard for Verification and Validation in Computational Fluid Dynamics and Heat Transfer ASME V&V 20-2009.14 5.4 COST Action 732“Quality Assurance of Microscale Meteorological Models”.15 5.5 Architectural Institute of Japan Guidelines.16 5.5.1 General.16 5.5.2 The guidebook for practical applications of CFD to pedestrian wind environment around buildings 18.16 5.5.3 Guidebook of recommendations for loads on buildings 2 19.16 5.6 VDI 3783 Part 9“Environmental meteorology prognostic microscale wind field mode-evaluation of flow around buildings and obstacles”.16 5.7 International Energy Agency Task 31 Wakebench Model Evaluation Protocol for Wind Farm Flow Models.17 5.8 MEASNET Evaluation of Site-Specific Wind Conditions.17 6 Summary of Benchmarking Validation Tests.17 6.1 General.17 6.2 DEWI Round Robin on Numerical Flow Simulation in Wind Energy.17 6.3 Bolund Experiment.18 6.4 European Wind Energy Association Comparative Resource and Energy Yield Assessment Procedures I and II(2011,2013).18 6.5 IEA Task 31 Wakebench Experiments.19 6.6 New European Wind Atlas Experiments 32.19 6.6.1 Perdigo (double ridge).19 6.6.2 Alaiz(complex terrain with a strong mesoscale component).19 6.6.3 sterild(flow over heterogeneous roughness).19 6.6.4 Kassel(flow over forested hill).20 6.7 Wind Forecast Improvement Project 2 34.20 6.8 Wind Tunnel Test Validation Data.20 6.8.1 Compilation of Experimental Data for Validation of Microscale Dispersion Models 23.20 6.8.2 AIJ wind tunnel.20 6.8.3 Wind tunnel te