Investigation of asymmetric twin-rudder load behaviour through free-running model tests

• Autorzy: Efremov Dobrin , Milanov Evgeni

Identyfikatory

DOI

10.2478/pomr-2023-0034

• Języki publikacji: EN

Abstrakty

EN

During tight manoeuvres, twin-screw ships equipped with two rudders located in the propeller slip stream experience a fairly large imbalance in the hydrodynamic loads on the propeller and rudders. To investigate the phenomenon of rudder asymmetric load in some depth, manoeuvring experiments based on a free-running model were set up in which the kinematics of the model, the forces on the rudder and the stock moment were recorded. In parallel, with the aim of obtaining an exact estimation of free-stream characteristics of the rudder blade, corresponding wind tunnel experiments were also performed. Based on the results of this investigation, an analysis of the interaction effects within the hull-propeller-rudder system was performed and some conclusions were drawn.

Słowa kluczowe

EN

manoeuvrability; twin screw–twin rudder ship; rudder; resistance; rudder normal force; interactions

• Wydawca: Gdańsk University of Technology, Faculty of Ocean Engineering & Ship Technology
• Czasopismo: Polish Maritime Research
• Rocznik: 2023
• Tom: nr 3
• Strony: 4--11
• Opis fizyczny: Bibliogr. 11 poz., rys., tab.

Twórcy

autor

Efremov Dobrin

• Bulgarian Ship Hydrodynamics Centre - Bulgarian Academy of Sciences, Varna, Bulgaria

• https://orcid.org/0000-0002-8517-3554

autor

Milanov Evgeni

• Bulgarian Ship Hydrodynamics Centre - Bulgarian Academy of Sciences, Varna, Bulgaria

• https://orcid.org/0000-0003-4733-2742

Bibliografia

• 1. A. Kamis, A. Fuad, A. Ashaari, C. Noor, and S. Ali, “Development of WOP mathematical model for optimum track-keeping. A ship simulation study using VLCC, focusing on hard over rudder turning circle with three stages of validation analysis,” Polish Maritime Research, vol. 28, no. 3, pp. 156–174, 2021, eISSN 2083-7429, https:// doi.org/10.2478/pomr-2021-0043.
• 2. A. Coraddu, G. Dubbioso, S. Mauro, and M. Viviani, “Analysis of twin screw ships’ asymmetric propeller behaviour by means of free running model tests,” Ocean Engineering, vol. 68, pp. 47–64, 2013, ISSN 0029-8018, https://doi.org/10.1016/j.oceaneng.2013.04.013.
• 3. G. Dubbioso and M. Viviani, “Aspects of twin screw ships semi-empirical maneuvering models,” Ocean Engineering, vol. 48, pp. 69–80, 2012, ISSN 0029-8018, https://doi. org/10.1016/j.oceaneng.2012.03.007.
• 4. S. Khanfir, V. Nagarajan, K. Hasegawa, and S. K. Lee, “Estimation of mathematical model and its coefficients of ship manoeuvrability for a twin-propeller twin-rudder ship,” in Proceedings of MARSIM, Panama City, vol. 9, pp. M159–M166, 2009.
• 5. S. Khanfir, K. Hasegawa, E. Kobayashi, and V. Nagarajan, “Mathematical model for manoeuvring of twin-propeller twin-rudder ship considering peculiar rudder normal force phenomenon,” in Proceedings of the International Conference on Marine Simulation and Ship Maneuverability, Singapore, vol. 1, 2012.
• 6. G. Dubbioso, D. Durante, A. Di Mascio, and R. Broglia, “Turning ability analysis of a fully appended twin screw vessel by CFD. Part II: Single vs. twin rudder configuration,” Ocean Engineering, vol. 117, pp. 259–271, ISSN 0029-8018, 2016, https://doi.org/10.1016/j.oceaneng.2016.03.001.
• 7. S. Khanfir et al., “Manoeuvring characteristics of twinrudder systems: Rudder-hull interaction effect on the manoeuvrability of twin-rudder ships,” Journal of Marine Science and Technology, vol. 16, no. 4, pp. 472–490, 2011, https://doi.org/10.1007/s00773-011-0140-3.
• 8. D. Kang, V. Nagarajan, K. Hasegawa, and M. Sano, “Mathematical model of single-propeller twin-rudder ship,” Journal of Marine Science and Technology, vol. 13, no. 3, pp. 207–222, 2008, https://doi.org/10.1007/ s00773-008-0027-0.
• 9. G. Dubbioso and M. Viviani, “Experimental investigation of asymmetrical propeller behavior of twin screw ships during manoeuvers,” in Proceedings of the International Conference on Marine Simulation and Ship Maneuverability, Singapore, vol. 1, 2012.
• 10. H. Yasukawa and Y. Yoshimura, “Introduction of MMG standard method for ship maneuvering predictions,” Journal of Marine Science and Technology, vol. 20, no. 1, pp. 37–52, 2015, https://doi.org/10.1007/s00773-014-0293-y.
• 11. Y. Yoshimura, “Mathematical model for manoeuvring ship motion (MMG model),” in Workshop on Mathematical Models for Operations Involving Ship-Ship Interaction, Tokyo, pp. 1-6, August, 2005.

Uwagi

PL

Opracowanie rekordu ze środków MNiSW, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2024).