22nd INTERNA TIONAL TOWING TANK CONFERENCE

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1 ^ NTERNATIONAL TECHNISCHE UNIVERSITEIT Scheepafaydrcaechanlca Archief Mekelweg 2, 2628 CD Delft Tel: /Paxï I OWING P Volume I 22nd INTERNA TIONAL TOWING TANK CONFERENCE Proceedings Volume I Seoul, Korea & Shanghai, China September 5-11, 1999 Korean Towing Tank Conference The Society of Naval Architects of Korea Chinese Towing Tank Conference The Chinese Society of Naval Architects and Marine Engineers

2 NTERNATIONAL Oein universiiy oi ibcnnmugy Ship Hydromechanics Laboratory Library Mekelweg CO Delft The Netherlands Phone: Fax: G I OWING 22nd INTERNATIONAL TOWING TANK CONFERENCE Proceedings Volume I Seoul, Korea & Shanghai, China September 5-11, 1999 Korean Towing Tank Conference The Society of Naval Architects of Korea Chinese Towing Tank Conference The Chinese Society of Naval Architects and Marine Engineers

3 WmtNATIONAL 22nd INTERNATIONAL TOWING TANK CONFERENCE Organizing Committee Prof. Cheung M. Lee(Chair), Pohang University of Science & Technology Prof. Hong Cui Shen(Vice Chair), China Ship Scientific Research Center Dr. Seung-Il Yang(Secretary), Korea Research Institute of Ships & Ocean Engineering Prof. Hang Shoon Choi, Seoul National University Dr. Jin-Tae Lee, Korea Research Institute of Ships & Ocean Engineering Prof. Seung Hee Lee, Inha University Dr. Keh-Sik Min, Hyundai Maritime Research Institute Prof. Key Pyo Rhee, Seoul National University Prof. Shi-Tang Dong, China Ship Scientific Research Center Prof. Guo-Qiang Wang, Shanghai Jiao-Tong University Prof. Yan-Yiug Wang, Dalian University of Technology Prof. Xiu-Heng Wu, Wuhan Transportation University Sponsors Korea Research Foundation Korea Research Institute of Ships & Ocean Engineering The Society of Naval Architects of Korea The Chinese Society of Naval Architects and Marine Engineers Hyundai Heavy Industries Co., Ltd. Samsung Heavy Industries Co., Ltd. Editor Dr. Seung-Il Yang Korea Research Institute of Ships and Ocean Engineering

4 PREFACE On behalf of Chinese Towing Tank Conference and Korean Towing Tank Conference, I take great pleasure in welcoming the 22nd hitemational Towing Tank Conference to Seoul and Shanghai. During the last three years, the members of the technical committees, Advisory Coimcil, and Executive Committee have all contributed their precious time and efforts in carrying out the assigned tasks, thus raising the state of the arts in the marine hydrodynamic technology. It would be very difficuh to find an international professional organization such as ITTC which has been run with harmoneous cooperations among the member organizations for as long as sixty six years. The 22nd ITTC witnessed extensive activites of the technical committees. All together seventeen committees, five more than in the previous conference, are reporting their accomplishments of the past three years at this meeting. Significant technical achievements are made in the wide areas of marine hydrodynamics which are of fimdamental and current interest to the tankery business. The emphasis on the uncertainty analyses for experimental and numerical results are intensified and, for the first time, a review of the qualificatins of one half of the Advisory Council member organizations was carried out, and a manual of ITTC recommended procedures is published. To keep in pace with the information era, the ITTC home page was created which describes in detail the objectives, functions and activities of the ITTC. All of these efforts are oriened toward strengthening the quality of the ITTC. As the demand for efficient, safe and economic marine transportations increases, the challenge to shipbuilding industry becomes more stringent. Thus, ITTC has to function as a coordinating body to harness all the advanced technical knowledges and informations to meet the challenges. To advance the technologies in design and prediction of performance of marine vehicles and structures and therefore to offer better technical services to the marine industry, we have laid out the tasks to be performed by the technical committees of the 23rd ITTC. I am confident that the Committees, following the past tradition, will perform their tasks satisfactorily. As was the case for the 21st Conference, the venue for the 22nd Conference is not one. One half of the conference will be held in Seoul and the rest of the half will be in Shanghai. Although, the time to be spent for transition from Seoul to Shanghai may seem tedious, I hope it will offer worthwhile experiences to the participants from the Occident in learning more about the oriental culture and it may help all of us to understand reality that we all have to live together as one global community. Choung M. Lee Chairman, Executive Committee, 22nd ITTC

5 11 Table of Contents Proceedings of the it^ ITTC Volume I Preface * Table of Contents " Committees of the 22nd ITTC 1 Report of the Advisory Council ^ 1. Membership and Meetings 5 2. Activities and Recommendations of the Advisory Council 5 3. Officers for the 23rd ITTC Advisory Council 7 Report of the Executive Committee 9 1. Introduction " 2. Obituaries ^ 3. Committee Membership Committee Meetings Committee Decisions 1^ Report of the Propulsion Committee General 1' 2. Review the State of the Art, Comment on the Potential Impact of New Developments on ITTC, and Identify the Need for Research and Development in the Areas of Propulsors, Cavitation and Powering Performance. Monitor and Follow the Development of New Experimental Techniques and Extropolation Methods 3. Review the ITTC Recommended Procedures, Benchmark Data, and Test Cases for Validation and Uncertainty Analysis and Update As Required. Pass the Information to the Quality Systems Group for Publication in Identify the Requirements for New Procedures, Benchmark Data, Validation, Uncertainty Analysis and Stimulate the Necessary Research for Their Preparation 5. Prepare an Up-to-date Bibliography of Relevant Technical Papers and Reports... 6 Review the Development of Design and Analysis Methods for Propulsors with Special Emphasis on the Modelling of Vortex Wake. The Committee should Consider Repeating the 18th ITTC Comparative Exercise Review-of Task 5 RANS/PANEL Method Workshop 39

6 8. Review Research on the Preformance of Propellers in Various Conditions such as for Ships When Tuming, Accelerating, Decelerating, Backing, or Operating in Waves 4g 9. Review Availability LDV and PIV Data for Propulsors Review the Correlation of Liquid Quality (Liquid Tension and Nuclei Distribution) with Cavitation Inception and the Stability of Cavitation Patterns. Cavitation Experimental Techniques should be Reviewed to Predict Cavitation Behavior more accurately. The Effects of Turbulence and Propeller Blade Roughess should be Taken into Account General Technical Conclusions Recommendations to the Conference Recommendations for Fumre Work References gj Report of the Manoeuvring Committee General yj 2. Special Groups Hydrodynamic Forces Simulation of Dynamics 7g 5. Scale Effects and Validation Ship Operation and Safety 7. Model Test Techniques ESSO OSAKA Benchmark Study. '. 1 oo 9. Technical Conclusions Recommendations to the Conference Recommendations for Future Work 107 References JQ^ Report of the Loads and Responses Committee General 2. Developments in Experimental Techniques ITTC Recommended Procedures Benchmark Experimental Data 'AA^[^[''[[[A^[ Multi-Directional Wave Spectra j Water Impact 7. Hydroelastic Problems in Ocean Engineering Forces Which Determine the Low Frequency Motions of Moored Vessels Added Resistance j^,^ 10. Trends in the Numerical Prediction of Ship Motions Wind Loads 12. Conclusions and Recommendations y.. ".! References, Ijo Report of the Resistance Committee 1. Introduction j.^^ 2. Resistance and Flow Physics 174

7 iv 3. Trends in Experimental Techniques Trends in Computational Fluid Dynamics Uncertainty Analysis for Experimental Fluid Dynamics Uncertainty Analysis for Computational Fluid Dynamics Prognosis for Towing-Tank Work Recommendation References 228 Report of the Symbol and Terminology Group General Work of the Group Recommendations to the 22nd Conference Appendices 252 Report of the Quality Systems Group General Guidance on the Steps Which must be Followed and Issued to be Addressed by ITTC Member Organizations to Achieve ISO 9001 Certification ITTC Quality Systems Manual Conclusions 271 Recommendations to the Conference 271 Recommendations for Future Work 271 Appendices 1. The Rules of the Organization Aims Activities Membership Organisation Groups Meetings Composition of Executive Committee based on Geographic Areas List of Geographic Areas General Additional Guidelines for the Operation of the ITTC New Technical Committee Structure Structure of the Technical Committees Terms of Reference of General and Specialist Committees Mechanism for Identifying New Specialist Technical Committees Tasks of Specialist Committee of 23"" ITTC 279

8 3. Index of ITTC Documents ITTC Organisation Proceedings ITTC Publications ITTC Addresses ITTC Homepage Member Organisations Delegates invited to the 21st ITTC Guidelines for Preparation of Technical Committee and Working Group Reports Overview Materials Page Geometry Text Mathematics Graphic material References 309

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