van Terwisga (Chairman) Report 1333-P 2002 Published in: Proceedings of the 23rd International Towing Tank Confèrence, ITTC2002, Volume 2, Venice, Italy, September 814, 2002 TU Deift Faculty of Mechanical Engineeringand Marine Technology All data measurement should conform to the recommendations of the relevant ITTC Procedures regarding uncertainty analysis. Review the ITTC recommended proce-dures, benchmark data, and test cases for validation and uncertainty analyses and up-date as required. Analysis of speed/power trial data, Procedure Number 7.5-04-01-01.2, 2005. The typical operation scheme of testing procedure in ITTC 4. The present Recommended Procedure con-cerns the preparation and execution of speed-power trials, as well as the method of analysing the results. : Captive tests (PMM + CMT): Captive Model Test Procedure, No. The 1978 ITTC PERFORMANCE Prediction Method is the method developed to predict the rate of propeller revolutions and delivered power of a single screw ship from the model test results. (2-1) is calculated according to the ITTC-1957 frictional correlation line (Log -2)2 = Re 0.075 C 10 F(2-4) where Reis the Reynolds Number for the re- spective temperatures. ITTC – Recommended Procedures 7.5-02 -02-02 Page 3 of 17 Resistance Uncertainty Analysis, Example for Resistance Test Effective Date 2002 Revision 01 Approved stability test procedure b. In order to perform model tests for any ship, it is of course necessary to have a physical ship model to be towed. Standards for respirators with and without chemical, biological, radiological, and nuclear protection, standards approved and under development. ITTC—recommended procedures and guidelines (7.5-02-07-02.2), 2014. 3.3 EHP Expansion: Use the ITTC-1978 method to expand the model test data to full scale. The viscous and the residuary resistance of the ship are calculated from the model resistance tests assuming the form factor to be independent of scale and speed. Recommended Procedures and Guideline 7.5-02-03-03.3, Cavitation Induced Pressure Fluctuations Model Scale Experiments [5] ITTC 1987). In ice testing Froude’s scaling laws are fol-lowed. ITTC-78 method The ITTC-57 method was superceded by the ITTC-78 method. The details of the work of the experimental naval architects and researchers who developed and are developing better model testing techniques are interesting and important. Here, we will stick to the outcome. 1. From the test results, calculate C 7.5-02-06-01, 2008. INTRODUCTION . It has been defined by the 27th and the 28th ITTC Specialist Committee on the Per-formance of Ships in Service. The Integrated Train Testing Centre (ITTC) is a future railway testing facility in Singapore, commissioned by the Land Transport Authority (LTA). The development of these procedures is coordinated by the International Towing Tank Conference (ITTC), where all model test institutes are represented. We also act as part of the International Towing Tank Conference (ITTC) to develop the guidelines on establishing the EEDI values. The Integrated Train Testing Centre (ITTC) supports ongoing efforts to renew, upgrade and expand the rail network in Singapore; sustaining rail reliability, and deepening core rail engineering capabilities in Singapore. Google Scholar SSPA, as an independent consultancy and an established model test basin, can help derive the hydrodynamic part of the EEDI value for new ships. Tank Conference (ITTC). For issues mentioned above, model test procedure and extrapolation method are described and discussed. 6.0 Conclusion. The test procedures used are in accordance, as applicable, with the ITTC Recommended Procedures. T. T K. ρ. Dn =and . To reduce the Test model. That consistency was the key to scaling model test results up ship scale values. The viscous and the residuary resistance of the ship are calculated from the model resistance tests assuming the form factor to be independent of scale and speed. In particular, the following procedures should be reviewed: Manoeuvring Trials Code including IMO criteria, ITTC procedure 4.9-03-04-01 Captive Model Test Procedure, ITTC procedure 4.9-03-04-03 Each towing-tank test method is well described in the (ITTC, 2014, 2017a; 2017b), and seakeeping tests done in the towing tank at Seoul National University are summarized in Lee et al., 2017, Lee et al., 2017, Park et al. Validation of Manoeuvring Simulation Models . Nevertheless, problems with applying this method for unconventional propellers like Kappel or CLT propellers occurred and a need to update the procedure has arisen. 1. No detailed test procedures … No detailed test procedures … In this work the Committee took into account: ITTC 7.5-04-01-01.1 &.2, 2014, PURPOSE OF PROCEDURE To carry out model-scale cavitation tests with azimuthing podded propulsor(s) so as to give results which are consistent, reliable and comparable amongst ITTC organizations. Model testing – the most accurate and reliable method for calculating a ship’s resistance is by performing a model test. Thrust T M, and torque MQ, measured in the self-propulsion tests are expressed in the non- di-mensional forms as in the procedure for propul-sion test (7.5-02-03-01.1). ITTC – Recommended Procedures and Guidelines 0.0 Page 1 of 10 REGISTER Effective Date 2017 Revision 07 Updated by Approved Quality Systems Group of the 28th ITTC ... Captive Model Test Procedure . 2017 . 7.5 Process Control . Truncate the data over a period of at least a few seconds where the model has reached full speed and take the average value of total resistance. 7.5-02-06-02, 2002 Fig. The ZNIIS experience in ITTC activities The Model network is developed (Rec. Test procedures. M M 42 M MM. ITTC (International Towing Tank Conference). The present Recommended Procedure con-cerns the preparation and execution of speed-power trials, as well as the method of analysing the results. The original idea was to promote the improvement of all aspects of ship model work and to reach an agreement on basic procedures and methods of presentation of results for publication. Captive Model Test. ITTC – Recommended Procedures and Guidelines 7.5-02 -04-02 Page 2 of 4 Testing and Extrapolation Methods Ice Testing Test Methods for Model Ice Properties Effective Date 2002 Revision 01 Test Methods for Model Ice Properties . For all model tests, we have to choose a scale, λ, for the model. ISBN: 978-1-118-85551-5 Fundamentals of Ship Hydrodynamics is designed as a textbook for ITTC – Recommended Procedures and Guidelines Page 1.0 - 01 1 of 17 Description and Rules of the ITTC Effective Date 2008 Revision 01 Edited Approved ... all towing tank organizations or model test laboratories that carry out hydrodynamic work . 12.4 ITTC.Report of the Specialist Committee on Procedures for Resistance, Propulsion and Propeller Open Water Tests. In this work the Committee took into account: ITTC 7.5-04-01-01.1 &.2, 2014, Finally, a hybrid procedure analyzing the struts as wing shapes and the pods as full hull forms is endeavored. Questionnaire on Model Test Procedure, Powering Method and CFD Computation Method for Podded Propulsion System Introduction The task assigned by the 25th ITTC to this specialist committee is to develop and validate practical experimental and numerical prediction procedures for full scale performance of Azimuthing podded Propulsion System. 2 SUBJECT VESSEL AND MODEL TEST SETUP Model testing facilities are using differ- For the speed-power prediction of a certain vessel, the ITTC’78 extrapolation method is widely used. R from the model resistance test re-sults is found in the procedure for resistance test (7.5-02-02-01). In 1978 the International Towing Tank Congress (ITTC) adopted a updated standardized procedure for performing ship resistance experiments and calculations. The ITTC- 78 method considers the total model resistance as the sum of a viscous component and a wave making component (see reference material). Committees of the ITTC on Waterjet Test Procedures (van Terwisga 2005), the ITTC Recommended Pro-cedures and Guidelines have been established and con-tinuously improved (ITTC 2005, 2011). Bronchoscopy is usually done in a procedure room in a clinic or in a hospital operating room. The tow force should, where possible, be ap-plied in the line of the propeller shaft and the horizontal component of the force measured. You will aslo find descriptions of some of the calculations and methods used at SSPA and how we work towards delivering the cost effective solutions that our clients around the world are looking for. Additionally, pod drag correction between model scale and full scale has a direct influence on the powering performance, and thoroughly considered with ITTC’s recommendation. Download : Download high-res image (516KB) Download : Download full-size image; Fig. (2007), which conforms to the ITTC Procedures 7.5-02-06 -02 Rev02, ‘Captive Model Test Procedure.’ 2.2 Data Acquisition and Reduction The present interest is in … The experiments of a well-known bulk carrier bare hull shape (the model LHI-007) has been set up and conducted at towing tank Indonesian Hydrodynamic Labotatory. (2015), and Lee et al. 7.5-02-03-02.1, Rev 01, 2002. Resistance tests are conducted to provide data from which the resistance of the model hull at any desired speed may be determined. Model tests must be conducted according to the ITTC Recommended Procedures for Resistance and Propulsion Model-Tests, including load variation tests. † 1Ck is the form factor determined from the resistance test, CFS is the frictional coefficient of the ship according to the ITTC-1957 ship-model correlation line, CR is the residual resistance calculated from the total and frictional coefficients of the model in the resistance tests as: CR Z CTM K ð1 C kÞCFM † … The model tests should generally be carried out according to the Recommended Procedures given by the 26th ITTC Manoeuvring Committee, i.e. 2014 … The ship model basins worldwide are organized in the ITTC (International Towing Tank Conference) to standardize their model test procedures. It is derived from the ITTC 1957 formula. The model should be as large as possible to minimize viscosity scale effects. Synonymous with nose-tail line. The 1978 ITTC PERFORMANCE Prediction Method is the method developed to predict the rate of propeller revolutions and delivered power of a single screw ship from the model test results. : captive tests (PMM + CMT): Captive Model Test Procedure, No. ITTC ? The International Towing Tank Conference (ITTC) identified an increasing need for guidelines and even standard test procedures for the execution of this type of ship model tests, in order to ensure the quality of the experimental results. To meet the requirements of water conditions set in ISO 15016:2015 [15], the test was carried out when the wind and waves are small (the wave height and wind speed must be lower than 0.2 m and 3.4 m/s). Testing and Extrapolation Methods . Committees of the ITTC on Waterjet Test Procedures (van Terwisga 2005), the ITTC Recommended Pro-cedures and Guidelines have been established and con-tinuously improved (ITTC 2005, 2011). Refer to a text book or the ITTC reports in order to get more details if and when you are responsible for model tests. PURPOSE OF PROCEDURE Captive model test techniques are applied to determine the hydrodynamic coefficients for a mathematical model of ship manoeuvring mo-tion. Fundamentals of ship hydrodynamics: fluid mechanics, ship resistance and propulsion. ITTC – Recommended Procedures and Guidelines 7.5 – 03 02 – 01 Page 3 of 12 CFD, Resistance and Flow Uncertainty Analysis in CFD Examples for Resistance and Flow Effective Date 1999 Revision 00 which were recently confirmed/updated by Longo and Stern (1999) closely following standard procedures (Coleman and Steele, 1999). ITTC tasks Activities of the Regional C&I Laboratory The unified testing DataBase of ITTC Support of all documents on equipment and software which is testing on the Model network include storage of etalon software Registration results of testing and all additional It should be noted that hydrodynamic force coefficients may be determined by other means, e.g. Finally, a hybrid procedure analyzing the struts as wing shapes and the pods as full hull forms is endeavored. State-of-the-Art Review 2. 7.5-02-06-03 . 7.5-02 . The model tests should generally be carried out according to the Recommended Procedures given by the 23rd ITTC Manoeuvring Committee, i.e. The propeller model for the propeller open water and self-propulsion tests was manufactured by Duralumin. It involves building a scaled down model of the actual vessel, performing tests on it in a model basin, and extrapolating the results to the actual vessel. The entire procedure, including prep and recovery time, typically takes about four hours. Procedure . the current ITTC scaling method for propellers is well proven and in use by the majority of the institutions. methods, Delen et al. dynamometer was calibrated with masses before model tests according to the ITTC Procedure [11] Tests are conducted at the Indonesian Hydrodynamic s Laboratory towing tank facility s … This thesis evaluates several techniques for extrapolating full scale resistance of SLICE hulls from model test data. The model surface finish, tolerances of manufacturing, and ballasting and trimming were also adjusted to satisfy the ITTC procedure. ITTC . Model-scale test methods2.1. This is the reason why the specialist committee on stability in waves was established in 1996 as one of technical committees of the ITTC. It is part of the extensive set of model testing procedures recommended by the ITTC. It has been defined by the 27th and the 28th ITTC Specialist Committee on the Per-formance of Ships in Service. Questionnaire on Model Test Procedure, Powering Method and CFD Computation Method for Podded Propulsion System Introduction The task assigned by the 25th ITTC to this specialist committee is to develop and validate practical experimental and numerical prediction procedures for full scale performance of Azimuthing podded Propulsion System. The procedures are: Resistance (Procedure 7.5-02-05-01) Waterjet (Procedure 7.5-02-05-03) Seakeeping (Procedure 7.5-02-05-04) Using Froude's hypothesis, the ITTC and Hughes methods are employed to analyze single length and fragmented wetted surface area procedures. This procedure focuses on those parts of the procedure that deviate from the propeller propulsion test. Rewrite Procedure 7.5-02-07-02.2 Predicting Power Increase in For model installation and trimming see ITTC Recommended Procedure 7.5-01-01-01, Ship Models. In general the procedure … The towing … Tests have been carried out in Ata Nutku Ship Model Testing Laboratory in this study. 10. In particular, the following procedures should be reviewed: Manoeuvring Trials Code including IMO criteria, ITTC procedure 4.9-03-04-01 Captive Model Test Procedure, ITTC procedure 4.9-03-04-03 The procedure is furthermore based on the ITTC procedure for propulsion tests (proc. In the present study, the random uncertainties are calculated based on the ITTC recommended procedures (International Towing Tank Committee (ITTC), 2005). The model test serves primarily to determine the wave resistance coefficient. Firstly, while recommended procedures and guidelines for full-scale resistance prediction based on model test extrapolation have been established by the ITTC for conventional (7.5-02-03-01.4) and high-speed craft (7.5-02-05-01), they do not include … Furthermore, this improved method can be an additional procedure of ITTC on the uncertainty analysis of self-propulsion tests. by system identification techniques applied to free running model test results. The purpose of the procedure is to provide an example for the uncertainty analysis of a model scale towing tank resistance test follow-ing the ITTC Procedures 7.5-02-01-01 Rev 00, ‘Uncertainty Analysis in EFD, Uncertainty Assessment Methodology’ and 7.5-02-01-02 Rev 00, ‘Uncertainty Analysis in EFD, Guide-lines for Towing Tank Tests.’ It is shown that the classical The model tested should be considered to have reached unacceptably high roll The ITTC recommended procedures pecu-liar to high-speed craft are given as separate procedures for each test type. 7.5-02-06-01, 2008. Review the ITTC recommended proce-dures, benchmark data, and test cases for validation and uncertainty analyses and up-date as required. A benchmark test will insure that the equipment, procedures, and uncertainty estimates are adequate. ITTC researchers will test whether the Bluetooth components are capable of interacting as intended.Bluetooth devices are only as useful as their ability to communicate and interoperate with other Bluetooth devices. PROCEDURE FOR HYBRID MODEL TESTS This procedure will concentrate on those tests where some sort of computer controlled actuator is used to substitute for a fully modeled mooring system in the physical model test of a floating offshore structure in deep water. used two ITTC (2002 and 2014) procedures based on different standards to analyze the uncertainty of ship model resistance tests … Free model tests: Free-Sailing Model Test Procedure, No. ITTC 7.5-02-07-02.2, ITTC Recommended Procedures and Guidelines, Prediction of Power Increase in Irregular Waves from Model Test 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. Test methodology, post-test analyses and extrapolation to full-scale are guided by ITTC Recommended Procedures; see International Towing Tank Conference. Free model tests: Free-Sailing Model Test Procedure, No. Although the importance of stability model testing increases, the ITTC member organisation had had no standard test procedures of such testing. ITTC, 2002: Captive Model Test Procedure) (b4) free model tests with system identia- fic tion (b5) full scale trials with system identifica-tion (b6) calculation of forces resulting from pre-scribed kinematics by techniquesCFD (see 26. th ITTC, 2011: Guideline on use Note that it is conventional to give model test results as if the tests were done with 15°C water. Since the establishment of the ITTC Ship/Model Correlation Line, based on extensive flat-plane tests by G. Hughes, in 1957, there has been a growing use of the correlation formula together with a form factor analysis and some testing of the formula's validity; work by B.S. Extrapolation of the friction resistance. The procedure is similar to the procedure for Hughes-Prohaska, but the frictional coefficient is determined following the ITTC 1957 formula instead of Hughes' formula. Lines plan or offsets suitable for digitizing (an electronic hull model may also be submitted but lines or offsets are required to validate the model) c. Hydrostatics Curves or tabulated data d. Test field notes signed by Coast Guard witness and including: 1. Resources and Technical Support. ITTC – Recommended Procedures and … ITTC Benchmarking Test Case. 4. ITU-T Q.3903) More than 100 vendors/network solutions were tested for request of national ISP More than 50 test specification for … M M 52 M MM. The model tested should be considered as surviving if a stationary state is reached for the recommended 10 successive test runs. C TS and ∆R pod are the total resistance coefficient and the pod housing drag correction defined in ITTC recommended procedures and guidelines for the pod propulsion test . Sadly, physics makes it impossible to perfectly scale model test results up to ship scale. The model-scale and full-scale test methods are described in Section 2 and Section 3, respectively. Test conditions in the present procedure are a part of the full test matrix in Yoon et al. This paper is organized as follows. At the same time, the steps and methods of uncertainty analysis of ship model self-propulsion tests can be used as a reference for other towing tank tests. Additional resources and support contact information. Noise measurement test procedure Testing Database was developed (Rec. Model tests must be conducted according to the ITTC Recommended Procedures for Resistance and Propulsion Model-Tests, including load variation tests. A ship model basin is a physical basin or tank used to carry out hydrodynamic tests with ship models, for the purpose of designing a new (full sized) ship, or refining the design of a ship to improve the ship's performance at sea.It can also refer to the organization (often a company) that owns and operates such a facility. Respirator Standards. 26 . Lines plan or offsets suitable for digitizing (an electronic hull model may also be submitted but lines or offsets are required to validate the model) c. Hydrostatics Curves or tabulated data d. Test field notes signed by Coast Guard witness and including: 1. Section 4 presents the results and discussion. Captive Model Test. For all draughts and trims, the same methods, procedures and empirical coefficients must be used to extrapolate the model-scale values to full-scale. 05 . Also to provide a common base for the de-scription of the appearance of typical model-scale cavitation observed on these propulsors. As identified by the ITTC Specialist Committee on the Combined CFD/EFD Methods, if a part of the model testing or extrapolation procedure causes higher uncertainty than the numerical uncertainty and modeling errors of the CFD applications, the accuracy is expected to increase. ITTC – Recommended Procedures and Guidelines Model Manufacture Ship Models Table of Contents and Preface of L. Birk (2019). th ITTC 1. Manoeuvrability 7.5-02-06-02 . Recommended procedure for Open Water Test, No. T.J.C. Update Procedures • 7.5-02-07-02.3 Experiments on Rarely Occurring Events • 7.5-02-07-02.1 Model Tests on Linear and Weakly Non-linear Seakeeping Phenomena • 7.5-02-07-02.4 Validation of Codes in the Frequency Domain 3. 3.1.3 Installation The model should be run at the correct cal-culated displacement. RF = Frictional Resistance as per ITTC friction ]formula k1 = Form Factor describing viscous resistance of the Hull Form in relation to RF. the sinkage fore and aft, or the running trim and sinkage - is usually also measured. for any specific test. 2. It is the intention of the ITTC that the procedures and guidelines are ‘kept as generic as possible’. model resistance (in lbf). Wiley, first edition. 7.5-02-03-01.1). THE ITTC LINE - ITS GENESIS AND CORRELATION ALLOWANCE. Accordingly, ITTC submitted its new recommended procedure for speed/power trials to the 64th MEPC . : Captive tests (PMM + CMT): Captive Model Test Procedure, No. a. Test procedures. ofWaterjet Test Procedures" Final Report and Recommendations to the 23rd ITTC Prof.dr.ir. 6. Finally, the conclusions are given in Section 5. Note of concern: In the opinion of the ITTC Advisory Council, this procedure contains too many options rather than a definitive approach. 1 Ship model 3.2 Test process The test site was in an artificial port in Qingdao, China. Approved stability test procedure b. Procedures for uncertainty analysis of experimental resistance test were published by the ITTC (ITTC, 2002; ITTC, 2008; ITTC, 2014). The part I of the ITTC procedure (Preparation and Conduct of Speed/Power Trials) was also submitted to the 65th MEPC . Model Test Other(Towsin-Kwon) Same Formula except ・・・ ... ・Unified procedure to which correlates the model scale with trial results will results in a wrong prediction ... ITTC Special Committee is a powerful board to clarify the task P . a. The 22nd ITTC Manoeuvring Committee considered a thorough ITU-T Q.3900). Step 5: The constant term of the linear equation obtained from test 4 is modified to satisfy the ( J M , design power ratio), where J M is defined by w FM in step 2. Using Froudes hypothesis, the ITTC and Hughes methods are employed to analyze single length and fragmented wetted surface area procedures. Prediction of power increase in irregular waves from model test. presented in Tables 2 – 5. The International Towing Tank Conference (ITTC) 1978 performance prediction method is a procedure to predict the necessary delivered power of a vessel for trial conditions. Bronchoscopy itself usually lasts about 30 to 60 minutes. ITTC – Recommended Procedures and Guidelines 7.5 – 01 02 – 01 Page 5 of 19 Model Manufacture, Propeller Models Terminology and Nomenclature for Propeller Geometry Effective Date 1999 Revision 00 through, or nearly through, the fore and aft extremities of the section. 2-06. Thus, we will perform interoperability tests based on Bluetooth protocols and profiles. The running attitude of the model - i.e. The current pro-pulsion test procedure is referred to as “Mo-mentum Flux” method. A load-varying propulsion test only method is not included in the updated powering performance prediction procedure. It is the intention of the ITTC that the procedures and guidelines are ‘kept as generic as possible’. 7.5-02-06-02, 2008. The model tests should generally be carried out according to the Recommended Procedures given by the 26th ITTC Manoeuvring Committee, i.e. But we found a way around the scaling correlation problem. For all draughts and trims, the same methods, procedures and empirical coefficients must be used to extrapolate the model-scale values to full-scale. 7.5-0. 7.5-02-06-02, 2008. The size of the model will be restricted by the size of the tow tank facilities, available carriage. model test data. 3. The ITTC database of model and full scale trials data was found to have insufficient quality data to be used in a study of improving powering prediction methods A method to predict the sea margin of ships Before the procedure. 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And Preface of L. ittc model test procedure ( 2019 ) ITTC-1978 method to expand the model will be restricted by the ITTC! Of model testing facilities are using differ- all data measurement should conform to the Recommended Procedures given by ITTC! Of Ships in Service considered as surviving if a stationary state is for... The conclusions are given in Section 5 to perform model tests must be conducted to. If the tests were done with 15°C water it should be considered as surviving if stationary. 2 and Section 3, respectively and up-date as required correlation problem as “ Mo-mentum Flux ” method on. The speed-power prediction of power increase in irregular waves from model test results up ship scale model-scale to. To extrapolate the model-scale values to full-scale through the water are simultaneously measured and fragmented wetted surface area.. To full-scale propellers is well proven and in Use by the 23rd ITTC Manoeuvring Committee, i.e present procedure. Method of analysing the results the struts as wing shapes and the pods as hull. Chemical, biological, radiological, and test cases for validation and uncertainty analyses and up-date as required was!, propulsion and propeller open water tests typically takes about four hours respirators with and without chemical biological.