Academic literature on the topic 'International Towing Tank Conference (ITTC)'
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Journal articles on the topic "International Towing Tank Conference (ITTC)"
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Purnamasari, Dian. "KAJIAN IMPLEMENTASI PROSEDUR ITTC TENTANG PENGUJIAN HAMBATAN KAPAL BERDASARKAN SISTEM MANAJEMEN MUTU ISO/IEC 17025:2008." Wave: Jurnal Ilmiah Teknologi Maritim 7, no. 1 (2018): 25–30. http://dx.doi.org/10.29122/jurnalwave.v7i1.3197.
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ITTC (The International Towing Tank Conference) merupakan asosiasi independen dari organisasi di seluruh dunia yang memiliki tanggung jawab untuk prediksi kinerja hidrodinamika kapal dan instalasinya berdasarkan hasil pemodelan fisik dan numerik. UPT-BPPH terdaftar sebagai anggota ITTC sehingga dalam menetapkan metode atau prosedur pengujian, pemilihan dan menjaga pemutakhiran metode sesuai ruang lingkup pengujian yang dilaksanakan sesuai ITTC. Tetapi pemilihan dan pemutakhiran prosedur ITTC di UPT BPPH masih belum maksimal dan terkait pengajuan akreditasi SNI ISO/IEC 17025 UPT BPPH sebagai Laboratorium Pengujian Hidrodinamika untuk mendapatkan pengakuan oleh Komite Akreditasi Nasional (KAN) maka kajian implementasi prosedur ITTC tentang pengujian hambatan kapal dilaksanakan dengan metode mengintegrasikan antara persyaratan teknis SNI ISO/IEC 17025 dengan prosedur ITTC terkait pengujian hambatan kapal sehingga prosedur ITTC tersebut dapat diimplementasikan secara maksimal dan didokumentasikan sebagai bagian dalam dokumen sistem mutu UPT BPPH
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Grigson, Christopher. "Note on an Accurate Turbulent Velocity Profile for Use at Ship Scale." Journal of Ship Research 33, no. 03 (1989): 162–68. http://dx.doi.org/10.5957/jsr.1989.33.3.162.
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Determinations of von Karman's constant and of B0 in the law of the smooth wall are compared and the considerable disagreement is explained. One determination, however, unique in its nature, seems definitive. A turbulent velocity profile equation with revised constants and a modified wake term is fitted with high precision to measurements above Rn = 107. Calculations which employ the profile lead to planar drag coefficients about 5 percent larger at full scale than those predicted by the 1957 International Towing Tank Conference (ITTC) line.
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Purnamasari, Dian, AAB Dinariyana, and Meitha Soetardjo. "Analisa Ketidakpastian Pengujian Resistance Model Kapal LCT 1000 DWT." Wave: Jurnal Ilmiah Teknologi Maritim 4, no. 1 (2019): 21. http://dx.doi.org/10.29122/jurnalwave.v4i1.3537.
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Uji tahanan yang dilakukan di tangki tarik memiliki kesalahan (ketidakpastian) pada hasil. Analisa ketidakpastian dapat digunakan untuk mengevaluasi kualitas data percobaan dan menyediakan perkiraan kuantitatif kesalahan percobaan. Metodologi analisa ketidakpastian, prosedur, dan hasil disajikan untuk uji tahanan model kapal LCT 1000 DWT skala (λ) 15 dengan ukuran model kapal L = 3,997 M, B = 1000 M, T = 0,167 M, WSA = 4,089 M2, Prosedur dirangkum dan mengikuti International Towing Tank Conference (ITTC) Kualitas Manual Prosedur. Hasil penelitian menunjukkan nilai ketidakpastian sebesar 1,27% dari kecepatan 1,3271 m/s dan nilai ketidakpastian sebesar 4,79% dari tahanan 1,2771 kg.Keywords : Uncertainty analysis, Procedures, Ship model test.
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Sun, Jianglong, Haiwen Tu, Yongnian Chen, De Xie, and Jiajian Zhou. "A Study on Trim Optimization for a Container Ship Based on Effects due to Resistance." Journal of Ship Research 60, no. 01 (2016): 30–47. http://dx.doi.org/10.5957/jsr.2016.60.1.30.
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The objective of this paper is to perform trim optimization on a 4250-TEU container ship based on the influence of trim on the resistance by using computational fluid dynamics (CFD) in conjunction with towing tank tests. First, the International Towing Tank Conference (ITTC) procedures were applied to uncertainty analysis of CFD and the CFD procedure was further verified and validated through three representative resistance curves obtained by the tests. Next, a series of resistance curves in different conditions with varied drafts and trims were obtained by the CFD computations for the model to provide data source to analyze the influence of the trim on the resistance. Results indicate that the variation of wave-making resistance due to trim dominates that of the total resistance. Finally, the resistance data for the model were converted to the engine power of the real ship. At each speed, the response surface of engine power with respect to drafts and trims was constructed and thus a trim optimization program was developed. The real ship operated under the instruction of the trim optimization program can save energy and reduce emissions significantly.
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Du, Lei, Zhuang Lin, Yi Jiang, Ping Li, and Yue Dong. "Numerical Investigation on the Scale Effect of a Stepped Planing Hull." Journal of Marine Science and Engineering 7, no. 11 (2019): 392. http://dx.doi.org/10.3390/jmse7110392.
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This article discusses the scale effects on a planing boat, utilizing the computational fluid dynamics method. The simulation is compared with a tank test for verification and validation. The planing boat sails use both aerodynamics and hydrodynamics. Studying the performances and wave patterns of different dimensions of the models is the best way to investigate the scale effect without using experimental data. The resistance is discussed in two parts, namely residuary resistance and friction resistance, and is compared to the calculated data using the international towing tank conference (ITTC) formula. The computational fluid dynamics (CFD) calculations of the model are increased by 4.77% on average, and the boat computations are also increased by 3.57%. The computation shows the scale effect in detail. The residuary resistance coefficients at different scales are approximately equal, and the friction resistance coefficients show the scale effect. The scale effect for longitudinal steadiness is also captured for the period of the porpoising behavior. The rational for the full-scaled boat oscillation period and the model is the root of the scales.
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Zhang, Zhang, and Shang. "A Potential Flow Theory and Boundary Layer Theory Based Hybrid Method for Waterjet Propulsion." Journal of Marine Science and Engineering 7, no. 4 (2019): 113. http://dx.doi.org/10.3390/jmse7040113.
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A hybrid method—coupled with the boundary element method (BEM) for wave-making resistance, the empirical method (EM) for viscous resistance, and the boundary layer theory (BLT) for capture of an area’s physical parameters—was proposed to predict waterjet propulsion performance. The waterjet propulsion iteration process was established from the force-balanced waterjet–hull system by applying the hybrid approach. Numerical validation of the present method was carried out using the 1/8.556 scale waterjet-propelled ITTC (International Towing Tank Conference) Athena ship model. Resistance, attitudes, wave cut profiles, waterjet thrust, and thrust deduction showed similar tendencies to the experimental curves and were in good agreement with the data. The application of the present hybrid method to the side-hull configuration research of a trimaran indicates that the side-hull arranged at the rear of the main hull contributed to energy-saving and high-efficiency propulsion. In addition, at high Froude numbers, the “fore-body trimaran” showed a local advantage in resistance and thrust deduction.
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Lungu. "Scale Effects on a Tip Rake Propeller Working in Open Water." Journal of Marine Science and Engineering 7, no. 11 (2019): 404. http://dx.doi.org/10.3390/jmse7110404.
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The scale effect on the accuracy of a numerical simulation in ship hydrodynamics represents an important issue of the propeller numerical analysis. To grasp a better understanding on the influence of this effect, an introspection on the performances of an unconventional propeller is proposed in the present study. The paper describes an investigation of the performances of a tip rake propeller recently chosen as benchmark by the International Towing Tank Conference organization (ITTC hereafter). The numerical simulation is carried out by making use of the ISIS-CFD solver, part of the FineTM/Marine package available in the NUMECA suite. The solver is based on the finite volume method to build the spatial discretization of the governing equations. The incompressible unsteady Reynolds Averaged Navier-Stokes Equations (RANSE) are solved in a global approach. Reported solutions are compared with the experimental data provided by Schiffbau-Versuchsanstalt (SVA) Potsdam GmbH to validate the accuracy of the numerical approach. Since for the full scale the experimental data could not be possible, the ITTC’78 extrapolation method-based proposed by the SVA Potsdam has been taken as a basis for comparisons and discussions. A set of remarks will conclude the paper by providing some guidelines for further approaches in terms of the particulars of the numerics that may be further employed in similar studies.
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Lin, Yu-Hsien, and Chia-Wei Lin. "Numerical Simulation of Seakeeping Performance on the Preliminary Design of a Semi-Planing Craft." Journal of Marine Science and Engineering 7, no. 7 (2019): 199. http://dx.doi.org/10.3390/jmse7070199.
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This study established a seakeeping program to evaluate the motion responses of a high speed semi-planing craft and to develop a database for future route planning. A series 62 mono-hull was chosen for the test cases, comparing seakeeping performances with full-scale on-board measurements. The statistical results were obtained using spectral analysis, which combines the International Towing Tank Conference (ITTC) spectrum with the response amplitude operator (RAO) responses of each wave heading for a given sailing speed. The speed polar diagram was made to illustrate five degree-of-freedom (DOF) motion responses between sailing speeds and wave heading angles in a particular sea state. Although the craft has different trim angles at high speeds (because of dynamic lift) under various loading and draft conditions, this study only investigated the trim angles of 0° (even keel), 1° by the stern, and 2° by the stern, to understand the difference between their seakeeping performances. The results in this study provide a useful guideline for evaluating operational regulations and safety for high speed semi-planing crafts in the future.
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Bhushan, Shanti, Tao Xing, Pablo Carrica, and Frederick Stern. "Model-and Full-Scale URANS Simulations of Athena Resistance, Powering, Seakeeping, and 5415 Maneuvering." Journal of Ship Research 53, no. 04 (2009): 179–98. http://dx.doi.org/10.5957/jsr.2009.53.4.179.
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This study demonstrates the versatility of a two-point, multilayer wall function in computing model-and full-scale ship flows with wall roughness and pressure gradient effects. The wall-function model is validated for smooth flat-plate flows at Reynolds numbers up to 109, and it is applied to the Athena R/V for resistance, propulsion, and seakeeping calculations and to fully appended DTMB 5415 for a maneuvering simulation. Resistance predictions for Athena bare hull with skeg at the model scale compare well with the near-wall turbulence model results and experimental fluid dynamics (EFD) data. For full-scale simulations, frictional resistance coefficient predictions using smooth wall are in good agreement with the International Towing Tank Conference (ITTC) line. Rough-wall simulations show higher frictional and total resistance coefficients, where the former is found to be in good agreement with the ITTC correlation allowance. Self-propelled simulations for the fully appended Athena performed at full scale using rough-wall conditions compare well with full-scale data extrapolated from model-scale measurements using the ITTC ship-model correlation line including a correlation allowance. Full-scale computations are performed for the towed fully appended Athena free to sink and trim and the boundary layer and wake profiles are compared with full-scale EFD data. Rough-wall results are found to be in better agree-ment with the EFD data than the smooth-wall results. Seakeeping calculations are performed for the demonstration purpose at both model-and full-scale. Maneuvering calculation shows slightly more efficient rudder action, lower heading angle overshoots, and lower roll damping for full-scale than shown by the model scale.
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Zhao, Dagang, Chunyu Guo, Jianfeng Lin, Zuotian Zhang, and Xue Bai. "Prediction of Self-Propulsion Performance of Ship Model with Double L-Type Podded Propulsors and Conversion Method for Full-Scale Ship." Journal of Marine Science and Engineering 7, no. 5 (2019): 162. http://dx.doi.org/10.3390/jmse7050162.
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In this study, the self-propulsion performance of a ship model with double-L-type podded propulsors was predicted. Additionally, a conversion method for the performance of a full-scale ship was established based on the correction method published by the International Towing Tank Conference (ITTC) for the scaling effect of a single podded propeller and research reports on pod tests conducted by different ship research institutes. The thrust deduction and wake fraction of the ship were also analyzed. Furthermore, the self-propulsion performance of a full-scale ship with double L-type pods was determined, the full- and model-scale ships compared in terms of their flow fields and pressure charts, and the influence of the scaling effect analyzed. In addition, the calculation results were compared with the conversion results of a full-scale ship, and the reliability of the method adopted for the performance estimation of a full-scale ship with double podded propulsors was verified. The findings reported herein can provide statistics and technical support for the design of L-type podded propulsors and their application in full-scale ships, which are of theoretical significance and practical value in the engineering domain.
Dissertations / Theses on the topic "International Towing Tank Conference (ITTC)"
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Muñoz, Jaime Miguel Mariano Saldarriaga. "Estudo de uma metodologia para o dimensionamento de um tanque de provas do tipo reboque." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/3/3135/tde-01032011-113219/.
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Um tanque de provas do tipo reboque permite a realização de ensaios hidrodinâmicos com modelos em escala, sua presença é importante devido à possibilidade de obter características hidrodinâmicas que dimensionam a potência e qualidade do comportamento dos navios durante a sua operação, otimizando os projetos de forma particular ou geral, tanto para a navegação marítima, lacustre ou fluvial. O objetivo principal desta pesquisa é estudar e propor uma metodologia para o dimensionamento e concepção de um tanque de reboque para o Serviço Industrial da Marinha (SIMA PERU), principal estaleiro do Peru, de maneira que possa realizar os ensaios hidrodinâmicos correspondentes aos diferentes tipos de embarcações produzidas pelo SIMA PERU. Como propósito de estudo será desenvolvido uma análise de um tanque de reboque que permitirá ensaiar modelos de diferentes tipos de embarcações, levando em consideração as diferentes condições ambientais e climáticas relacionadas ao litoral peruano em toda sua extensão, isto é, uma condição marítima equivalente a uma escala Beaufort 5. Estas são as condições que foram requeridas para atuar na costa peruana. Será proposto um tanque de reboque com características próprias, baseado no razoável dimensionamento dos modelos reduzidos e nas necessidades e requerimentos de ensaio de acordo às recomendações apresentadas pela Conferência Internacional de Tanques de Reboque (International Towing Tank Conference- ITTC).<br>A towing tank allows hydrodynamic testing with scale models, their presence is important because allows to obtain hydrodynamics characteristics that they measure the power and quality of behavior during the operation, optimizing the designs in general or particular form of vessels for sea, lake or river. The main objective of this research is to study and propose a method for sizing and development of a towing tank for the Naval Industrial Service; SIMA - PERU, main shipyard from Peru, so it carry out hydrodynamics tests corresponding to different types of vessels produced by SIMA - PERU. The purpose of study will be developed analysis of a towing tank that will test models of different types of vessels, taking into account the different environmental and climatic conditions related to the Peruvian coast, in other words, sea conditions equivalent to a Beaufort \"5\". These are the conditions that were required to act on the Peruvian coast. Will be offered a towing tank with its own characteristics, needs and requirements based on the consistent sizing of reduced models and according to the recommendations made by the International Towing Tank Conference - ITTC.
Conference papers on the topic "International Towing Tank Conference (ITTC)"
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Krijger, Jan Willem, and Dimitris Chalkias. "Limitations in Scaling Towing Tests for Simple Pontoon Shapes." In ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/omae2017-61465.
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For merchant vessels full scale resistance is determined by extrapolating the towing tank tests using Hughes’ method. For blunt and simple shapes this approach might not be valid due to significant Reynolds dependency. In this paper a study is presented on two semi-submersible pontoon shapes and one drillship. The resistance for these hulls was calculated using URANSE simulations. Four different scales: 1:1, 1:10, 1:20 and 1:40 were investigated for all the different hull shapes. The goal of the study was to determine a form factor to use when scaling towing test results to full scale. However due to the simple shapes of the pontoons it was found that there was a significant Reynolds dependency at all the different scales. This Reynolds dependency had much more influence on the full scale resistance than a form factor. For the drillship no significant Reynolds dependency was found and applying ITTC 1978 method [1] with a form factor improved the accuracy of the resistance prediction compared to using the Froude method which is not using a form factor. The simple pontoon shapes used were based on a combination of boxes, cylinders and spheres. The cylindrical and spherical shapes have a Reynolds regime where a drag crisis occurs. For all the shapes the drag crisis regimes were right in the same Reynolds number range at which typical model tests would be performed. Therefore performing towing tests and making accurate full scale resistance predictions for these simple shapes is not straightforward. Applying the ITTC 1978 method does not provide the same level of accuracy as it does for merchant vessels. The paper identifies limitations involved in scaling towing test results for typical offshore hull shapes. Further possible solutions are proposed to improve the accuracy of the resistance predictions.
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Qiu, Wei, Jean-Marc Rousset, Heather Peng, Wei Meng, and Boris Horel. "Benchmark Tests of Two Body Interaction in Waves." In ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/omae2017-61514.
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As part of the test campaign led by the 27th ITTC Ocean Engineering Committee to produce reliable experimental benchmark data for multiple-body interactions in waves, model tests of two identical models in close proximity were carried out at the towing tank of Memorial University, Canada and at the wave basin of Ecole Centrale de Nantes, France. This paper presents the experimental results for the two bodies in regular waves with various gaps. The experimental data, including motions of two bodies, wave elevations in the gap and drift forces, were compared with numerical solutions based on the potential-flow solution.
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Zhang, Li, Jianting Chen, Chuanming Zhou, and Weimin Chen. "Improved ITTC Uncertainty Analysis Method of Ship Model Self-Propulsion Tests." In ASME 2020 39th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/omae2020-19285.
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Abstract In this paper, the uncertainty analysis method of ITTC (2017) for ship model self-propulsion tests was studied, and the defects of the ITTC method were analyzed, which didn’t provide the method to analyze the tests results at different temperatures. Combined with the ship model self-propulsion tests carried out by SSSRI, an improved uncertainty analysis method was proposed. First of all, the ship model self-propulsion test process was combed to determine the error sources of uncertainty, and then according to the test principle of self-propulsion tests, an conversion method of test data at different temperatures was put forward. Furthermore, this improved method can be an additional procedure of ITTC on the uncertainty analysis of self-propulsion tests. 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. At last, an example of the uncertainty analysis of self-propulsion results in SSSRI was presented. The results show that at the nominal temperature of 15°C, at 95% confidence level, the expanded uncertainty of rotational speed n is less than 0.4%, and the expanded uncertainty of thrust T and torque Q is less than 1.0%. The expanded uncertainty of thrust deduction factor t is less than 5.5%, wake fraction w 1.1%, which shows that the test in this paper has achieved high accuracy.
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Thomas, Della, S. Surendran, and Nilesh J. Vasa. "Biofouling Characterization and its Effect on Resistance of Surface Ship." In ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/omae2019-96220.
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Abstract Manufacture of coatings to tackle the biofouling menace has been of prime concern for the shipping industry since industrial revolution. Even though many types of coatings exist in the market, they have not been able to wipe out the problem of biofouling completely. The proposed approach which combines both the resistance due to biofouling on ships, as well as biofouling characterization, will surely serve as a critical input for the manufacture of efficient anti-fouling coatings. Resistance simulations have been carried out for a tanker ship by Maxsurf® wherein the hull fouling effect has been accounted for by modified ITTC 1978 empirical formula considering roughness. Different draft conditions were relied upon to find out the resistance at various Froude numbers. The fouling growth conditions considered are small and medium calcareous fouling. The simulated results also have been validated by towing tank experiments, for no-foul condition, for speeds varying from 0.3 to 1.1 m/s and different drafts. The additional power requirement was determined for various loading conditions and speed ranges.
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Rateiro, Felipe, Edgard Borges Malta, Andre´ L. C. Fujarra, Daniel Prata Vieira, and Kazuo Nishimoto. "Investigation on the Effects of Risers in the Dynamics of Floating Systems." In ASME 2010 29th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2010. http://dx.doi.org/10.1115/omae2010-20381.
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This paper presents the experimental results obtained from the model tests performed at the IPT (State of Sa˜o Paulo Technological Research Institute) towing tank, located in Sa˜o Paulo, Brazil. The model used was the semi-submersible ITTC-SR192, at a scale 1:105. The main focus of this study is the analysis of the risers influence on the floating unit dynamics, taking into account damping effects caused by the lines. In order to establish basis of comparison the tests were performed with and without risers. These were modeled as a group of large diameter hoses that are able to provide a significant increment in the damping of the system. By such approach, it was possible to evaluate the changes on the dynamic behavior of the unit induced by the presence of risers. As an additional investigation tool, these results were analyzed with the aid of the software Numerical Offshore Tank (Tanque de Provas Nume´rico - TPN), which is a dynamic simulator of offshore systems based on parallel-processing developed by means of a partnership between the University of Sa˜o Paulo, Petrobras and other Brazilian research institutions. By means of the comparisons between the model tests results with and without risers and of the results from the numerical tool, TPN, the dynamic behavior of the floating unit was investigated in terms of the effects caused by the presence of risers, which is a very relevant subject as offshore industry walks towards ultra-depth waters.
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Järvelä, J., J. Aberle, and J. Jalonen. "Dynamic reconfiguration of riparian trees in towing tank experiments." In The International Conference On Fluvial Hydraulics (River Flow 2016). CRC Press, 2016. http://dx.doi.org/10.1201/9781315644479-339.
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Lopez Pena, F., M. Miguez Gonzalez, A. Deibe, D. Pena, and F. Orjales. "An autonomous scale ship model for towing tank testing." In 2013 IEEE 7th International Conference on Intelligent Data Acquisition and Advanced Computing Systems: Technology and Applications (IDAACS). IEEE, 2013. http://dx.doi.org/10.1109/idaacs.2013.6662633.
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Morooka, Celso K., Raphael I. Tsukada, Sergio da Silva, Ricardo Franciss, and Cyntia G. C. Matt. "Model Test of a Steel Catenary Riser in a Towing Tank." In ASME 2009 28th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2009. http://dx.doi.org/10.1115/omae2009-79499.
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The objective of the present work is the study of the dynamic behavior of steel catenary risers (SCRs), focusing on the contribution of vortex-induced vibration (VIV), through model test in a towing tank. Nowadays, a great deal of effort is being spent in order to better understand VIV’s contribution in the dynamics of riser structures through experiments, analytical analysis and numerical predictions. In the present work, the design of a SCR model test, along with its setup in a towing tank, will be described in detail and discussions of main results from the experiments will be presented. The experiment has been conducted under several simulated environmental condition combinations, varying the towing speed, riser top forced oscillation amplitudes, waves amplitudes and periods. Very promising results have been observed from the experiment. Riser oscillations due to high harmonics of vortex shedding were observed. Analysis of the experimental results, coupled with the support of numerical tools, showed the influence of the phenomena of traveling waves in the cross-flow response as is reported from the literature.
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Kleine, Felipe Augusto de Souza, Danyllo de Lima Guedes, Felipe Santos de Castro, Daniel Carvalho, and João Lucas Dozzi Dantas. "Maneuverability Towing Tank Experiments With Manifold Models: Part I — Static Tests." In ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/omae2018-77036.
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This work is the Part I of a two-part work, where the maneuverability of three manifold geometries was investigated by Towing Tank tests at the Institute for Technological Research, in order to verify the influence of geometrical simplifications and modifications. In this work is presented a comparison between the forces and moments measured in static drift tests, considering a pitch orientation ranging from 0 to 360 degrees, and the static hydrodynamic derivatives in a reference orientation. In the Part II, the investigations were complemented by the results of dynamic tests. The manifold models were constructed in a 1:13 scale. The first model was a geometrically simplified version of the prototype, composed of two simple blocks; the second one was constructed with almost all the prototype geometric details; the last one used the second model with a plate installed on its top. The tests results indicate that the geometrical simplification of manifold models did not have a significant influence on the maneuvering coefficients, in contrast to the addition of the top plate, which significantly changed the maneuvering capabilities of the model. The study presented in both papers will be used to form a data base for numerical simulation studies for manifolds installation.
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Sadiq, Salman, and Xiong-Liang Yao. "Combined Acoustic and Hydrodynamic Experimental Data Acquisition in Towing Tank: Moonpool Experiments." In ASME 2008 27th International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2008. http://dx.doi.org/10.1115/omae2008-57419.
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Time and cost effective experimental verification and accuracy procedures are the first and utmost requirements in ship building research conducted in towing tank. This paper presents towing tank experimental setup and procedures to acquire acoustic and hydrodynamic data at the same time for a moonpool experiment. The same technique can be applied on a variety of configurations to acquire combined acoustic and hydrodynamic data. In present work the experimental technique possesses the ability to monitor pressure fluctuations, acoustics, free surface wave height inside a moonpool and structural vibration of a moonpool model at the same time with a better estimation and accuracy. The results are compared with numerical modeling, empirical relations and a detailed collected data comparison analysis is given in light of ‘Empirical Mode Decomposition’ (EMD) method. Collected data from sensors are proved to be in engineering practice limits proving the importance and authenticity of the data acquisition procedure discussed here. We believe that the results and methods given in this paper have surely a permanent space in the technical literature.