Proceedings of the 24th International Towing Tank Conference, ITTC’05, Edinburgh, UK, Volume 1, 2 and 3, ISBN: 0-7017-0187-0, University of Newcastle Upon Tyne (summary)

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24th INTERNATIONAL

TOWINÖ TANK CONFERENCE

Edinburgh, United Kingdom

September 4 - 10, 2005

Proceedings

Volumes I , I I and I I I

U N I V E R S I T Y O F N E W C A S T L E U P O N T Y N E

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^ H E ^ Proceedings of the 24th ITTC - Volume I I I

Volume I

Preface v i i Table of Contents Volume I ix

Table of Contents Volume I I xiii Committees of the 24th I T T C 1

The Advisoiy Council 5

1. Membership and Meetings 5 2. Activities and Recommendations o f the Advisory Council 5

3. Officers for the 25th ITTC Advisory Council 7

The Executive Committee 9

1. Introduction 9 2. Obituaries 9 3. Committee Membership 13

4. Committee Meetings 13 5. Committee Decisions 14

The Resistance Committee 17

1. Introduction 17 2. Trends in Experimental Fluid Dynamics 18

3. Uncertainty Analysis in Experimental Fluid Dynamics 22

4. Trends in Computational Fluid Dynamics 26 5. Uncertainty Analysis for Towing Tank Measurements 33

6. Uncertainty Analysis in CFD 38 7. Far Field Waves and Wash 42 8. Developments in Modelling o f Relevance to Resistance 48

9. New Developments in Ship Concepts, Design Methods and Design Optimisation 52

10. Recommendations for Scaling and Extrapolation 56 11. Recommendations 5 8

12. References and Nomenclature 58

The Propulsion Committee 73

1. Introduction 73 2. Review the State-of-the-Art 74

3. Review the ITTC Recommended Procedures, Benchmark Data and Test Cases 82 4. Develop an ITTC Procedure for Specifying the Accuracy o f Model Propeller 87

Geometry Required for Propulsion and Cavitation Testing

5. Review the Development of Numerical Design and Analysis Methods for Propulsors 89 6. Review Design and Performance Aspects o f Secondary Thrusters, such as Tunnel, 94

Azimuthing and Dynamic Positioning Devices

7. Review Developments in Prediction and Assessment of Propulsion Issues in 100 Shallow Water

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8. Review Advancements in Numerical Metliods for the Computation of Propeller 105 Induced Effective Wake, Cavitation and Induced Hull Pressures

9. Review of Design Issues Related to Very Large Propellers for Mega Container 114 Ships, such as Vibratory Forces, Cavitation and Bearing Forces

10. General Technical Conclusions 121 11. Recommendation to the Conference 123 12. References and Nomenclature 123

The Manoeuvring Committee 137

1. Introduction 137 2. Progress in System-Based Simulation Methods 138

3. Progress in CFD-Based Manoeuvring Simulations 146

4. Benchmark Data 155 5. High Speed and Unconventional Vessels 160

6. Confined Waters 165 7. Manoeuvring Standards and Safety 175

8. Q M Procedures 183 9. Conclusions 186 10. Recommendations 188 11. References and Nomenclature 188

The Seakeeping Committee 199

1. Introduction 199 2. Review o f State-of-the-Art 201

3. ITTC Recommended Procedures 238 4. Conclusions and Recommendations 239 5. References and Nomenclature 242

The Ocean Engineering Committee 255

1. Introduction 255 2. Modelling/Simulation of Wave and Current Environments 257

3. Modelling and Simulation of Wind Environments 261 4. PredictingtheBehaviourof Bottom-Founded Structures 263 5. Predicting the Behaviour o f Stationary Floating Systems 269 6. Predicting the Behaviour o f Dynamically Positioned Ships 274 7. Vortex Induced Vibrations and Voitex Induced Motions 277 8. Prediction o f t h e Roll of Floaters with Risers and Mooring Systems 280

9. Review of Existing ITTC Procedures 283 10. Truncation o f Test Models and Integration with Numerical Simulations 284

11. Guideline on Modelling o f Directional Wave Spectra 285

12. Wave Generation in Shallow Water 286 13. Nonlinear Effects in Steep 100-Year Random Waves 288

14. Conclusions 290 15. Recommendations 292 16. References and Nomenclature 292

Appendix A : Questionnaire on Modelling / Simulation of Wind Environments 306 Appendix B : Nonlinear Effects in Steed 100- Year Random Waves (Benchmark Study) 310

The Quality Systems Group 313

1. Introduction 313 2. Review o f the "ITTC Recommended Procedures" 314

3. ITTC Symbols and Terminology List 318 4. Working Instructions on Standard Measuring Devices 319

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Proceedings of the 24th ITTC - Volume I I I

5. ITTC Dictionary on Hydrodynamics 319

6. ISO 9001/2000 320 7. Usage of ITTC Recommended Procedures 320

8. Conclusions 320 9. Recommendations to the Conference 320

10. Recommendations for Future Work 321

Appendix 1: Interim Taslis and Structure ofthe 25th I T T C Technical Committees and 323 Group

1. Structure of the Technical Committees 323 2. Terms of Reference for the General and Specialist Technical Committees and 323

Groups

3. Mechanism for Identifying New Specialist Technical Committees 324 4. Proposed Structure of the Technical Committees and Group for the 25th ITTC 324

5. Tasks of the Technical Committees and Groups of the 25th ITTC 325

Appendix 2: Form for Curriculum Vitae of Nominees to I T T C Technical Committees 333 Appendix 3: I T T C Technical Committees Members Performance Evaluation Sheet 335

Appendix 4: Application Form to I T T C Membership 337

Appendix 5: Rules ofthe Organisation 339

1. Aims 339 2. Activities 339 3. Membership 339 4. Organisation 340 5. Meetings 343 6. Composition o f Executive Committee Based on Geographic Areas 343

7. List o f Geographic Areas 343 8. General Additional Guidelines for the Operation o f the ITTC 344

Appendix 6: I T T C Member Organisations 345 Appendix 7: Delegates, Observers and Senior Members Invited to the 24th I T T C 359

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Proceedings of the 24th ITTC - Volume I I I xiu

Volume II

Preface v i i Table of Contents Volume I ix

Table of Contents Volume I I xiii The Specialist Committee on Stability in Waves 369

1. Introduction 369 2. Prediction o f Extreme Motions and Capsizing o f Intact Ships 370

3. Prediction o f Dynamics of Damaged Ships 381

4. Stability safety Assessment 391 5. IMO HSC Model Test Method 394

6. Evacuation in Waves 394 7. ITTC Member Survey 398 8. Conclusions and Recommendations 400

9. References and Nomenclature 401

The Specialist Committee on Assessment of Ocean Environmental Issues 409

1. Introduction 409

2. Oil 410 3. Marine Debris and Litter 416

4. CO2 422

5. Nutrients 425 6. Produced Water 429 7. Ballast Water and Sediment 429

8. Conclusions 432 9. References 433

The Specialist Committee on Ice 439

1. Introduction 439 2. Tasks for the 24th ITTC Ice Specialist Committee 439

3. Recommendation 439 4. Structure o f the Report 440 5. Task 1: Experimental Unceitainty Analysis for Ship Resistance in Ice Tank Testing 440

6. Task 2: Review o f Current Test Practices for the Performance o f Offshore Structures 450 in Ice

7. Task 3: Review o f Recent Developments in Remote Sensing and Satellite Detection 455 of Sea Ice

8. Task 4:Conduct Tests to Develop and Understanding for the Performance o f Open 463 Water Propellers in Ice

9. Task 5: Questionnaire for the use o f Numerical Methods Applied to Ice Engineering 466

10. Closing Remarks and General Conclusions and Recommendations 467

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xiv Table of Contents Volume I I

I J I V ^ U K

The Specialist Committee on Validation of Waterjet Test Procedures 471

1. Introduction 471 2. Literature Update 473 3. Powering Performance Prediction 476

4. Results of Self-Propulsion Tests 489 5. Results of Waterjet System and Pump Tests 499

6. Conclusions and Recommendations 503

7. References 504 Appendix A 507

The Specialist Committee on Cavitation Erosion on Propellers and Appendages on 509 High Powered/High Speed Ships

1. Introduction 509 2. Recommendations o f t h e 23rd ITTC 509

3. Literature Review 509 4. Scaling Law Summary 514

5. Test Procedure 520 6. Design Guidance 526 7. Conclusions 534 8. Recommendations 534 9. References and Nomenclature 534

Appendix A: Executive Summary of the EROCAV Project 539 Appendix B : Workshop on Cavitation Erosion - Bassin d'Essais des Carenes, Val de 542

Reuil,France

The Specialist Committee on Azimuthing Podded Propulsion 543

1. Introduction 543 2. Recommendations of the 23rd ITTC (Committee's Tasks) 543

3. Foreword 544 4. State-of-the-Art Review 545

5. Testing and Extrapolation 547 6. Guidelines on Extrapolation to Full-Scale 553

7. Procedures for Model-Scale Cavitation Experiments 558 8. Impact o f Off-Design Conditions on Loads and Stability 563

9. Impact on the I M O Manoeuvring Criteria 569

10. Special Applications for Pods 576 11. Technical Conclusions 579 12. References and Nomenclature 5 81

Appendix A : Improved Draft Procedures for Podded Propulsor Tests and Extrapolation 588

The Specialist Committee on Powering Performance Prediction 601

1. Introduction 601 2. Tasks set from the 23rd ITTC 601

3. Foreword 602 4. Preparation, Conduct and Analysis o f Speed/Powering Trials 603

5. Review of Extrapolation Methods 604 6. Model Tests-Trials Database 607 7. Evaluation of Extrapolation Techniques 607

8. Estimation ofUncertainty with Monte Carlo Methods 611

9. Powering Margins 629 10. Conclusions and Recommendations 635

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Proceedings of tfie 24th ITTC - Volume I I I xv

UK

Volume I I I

vn ix x i i i X V xvii xix Preface to Volume I I I Table of Contents Volume I Table of Contents Volume I I Table of Contents Volume I I I Programme ofthe 24th I T T C

Opening and Welcoming Address by H R H The Princess Royal

The Resistance Committee 639

1. Discussions 639

2. Committee Replies 640

The Propulsion Committee 643

1. Discussions 643 2. Committee Replies 650

The Manoeuvring Committee 653

The Seakeeping Committee 657

The Ocean Engineering Committee 665

The Specialist Committee on Stability in Waves 679

The Specialist Committee on Assessment of Ocean Environmental Issues 685

The Specialist Committee on Ice 687

1. Discussions 687 2. Committees Replies 690

The Specialist Committee on Validation of Waterjet Test Procedures 693

The Specialist Committee on Cavitation Erosion on Propellers and Appendages on 699 High Powered/High Speed Ships

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The Specialist Committee on Azimuthing Podded Propulsion 705

The Specialist Committee on Powering Performance Prediction 719

The Quality Systems Group 733

1. Discussions 733 2. Group Replies 733

Group Discussion 1- Full Scale Trials 735

1. Presentations 735

Group Discussion 2- Vortex Induced Vibrations 747

Group Discussion 3- New Facilities 761

Group Discussion 4- I T T C Guidelines and Procedures 787

4. Presentations 787 5. Discussions 790 6. Group Discussion Replies 791

Errata 793 Appendix 1: Structure of the 25th I T T C Technical Committees and Group 797

Appendix 2: Members ofthe 25th I T T C Committees and Group 807

Appendix 3: I T T C Member Organisations 811 Appendix 4: List of Participants at the 24th I T T C 825 Appendix 5: Speech by David Moor at the 24th I T T C Banquet 845