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Longitudinal motion due to action of tunnel thrusters

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Treść / Zawartość
Identyfikatory
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
Tunnel thrusters are propulsion and active control devises that provide a side force, or transverse thrust, to support mooring operations or position keeping. They shorten the time of manoeuvring, reduce the cost of towage and since inception, manoeuvrability specifically in ports has become a lot easier. Tunnel thrusters can either be operated manually or with the help of Dynamic Positioning systems which makes it even more efficient. Theoretically, the transverse force due to tunnel thruster action should generate only lateral and rotational motion. Therefore, it is typical and a common practice during manoeuvring simulations that the longitudinal motion due to the action of tunnel thrusters is neglected. Nevertheless, the experience of masters and pilots shows that some longitudinal motion due to the action of tunnel thrusters appears. This paper shows some examples of turning manoeuvres carried out with bow thrusters only, i.e. no additional control devices or tug assistance have been used. The manoeuvres have been carried with minimal possible initial longitudinal nor lateral speed. Model tests have been done with the use of large manned models of VLCS, PCTC and LNG carrier, which differ in hull shape, dimensions and shape coefficients. Results obtained from the tests confirm that the motion caused by bow thruster besides rotational and lateral motion consists additionally of longitudinal motion. Analysis of the combination of motions due to the action of tunnel thrusters have been done and some rationale for this phenomenon has been presented. Additionally a short analysis of position of pivot point during tunnel thruster test has been carried out.
Słowa kluczowe
Rocznik
Tom
S 1
Strony
74--79
Opis fizyczny
Bibliogr. 11 poz., rys., tab.
Twórcy
autor
  • Ship Handling Research and Training Centre Foundation for Safety of Navigation and Environment Protection, Poland
Bibliografia
  • 1. Abramowicz-Gerigk, T. (2008). Experimental study on the hydrodynamic forces induced by a twin-propeller ferry during berthing. Ocean Engineering, 35(3-4), pp.323-332
  • 2. Artyszuk, J. (2003). Ship sway/yaw motions while turning with bow lateral thruster. 15th International Conference on Hydrodynamics in Ship Design, Safety and Operation HYDRONAV 2003, Gdańsk
  • 3. Artyszuk, J. (2010). Pivot point in ship manoeuvring. Scientific Journals of Maritime University of Szczecin, 20(92), pp.13-24
  • 4. Brix, J. (1993). Manoeuvring technical manual. 1st ed. Hamburg: Seehafen Verlag GmbH, Germany
  • 5. Chislett M.S., Björheden O. (1966). Influence of Ship Speed on the Effectiveness of a Lateral – Thrust Unit. Report no. 8, Hydro- og Aerodynamisk Laboratorium, Kgs. Lyngby, Denmark
  • 6. Gierusz, W. (2016). Simulation model of the LNG carrier with podded propulsion, Part II: Full model and experimental results. Ocean Engineering, 123, pp.28-44
  • 7. IMO (1987). Resolution A.601(15) Provision and display of manoeuvring information on board ships
  • 8. Journee J.M.J., Pinkster J. (2002). Introduction in ship hydromechanics. Delft University of Technology, the Netherlands
  • 9. Quadvlieg F.H.H.A. and Toxopeus S.L. (1998). Prediction of crabbing in the early design stage. In: Practical Design of Ships and Mobile Units. Elsevier Science B.V., pp.649-654
  • 10. Reichel, M. (2017). Prediction of manoeuvring abilities of 10000 DWT pod-driven coastal tanker. Ocean Engineering, 136, pp.201-208
  • 11. SNAME (2015). Guide for Sea Trials (Progressive Speed, Maneuvering, and Endurance). SNAME Technical and Research Bulletin 3-47
Uwagi
Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-cf60cad0-192d-4b48-a278-85e5c5e0179e
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