A simplified method for calculating propeller thrust decrease for a ship sailing on a given shipping lane

• Autorzy: Żelazny K.
• Języki publikacji: EN

Abstrakty

EN

During ship sailing on rough water, relative ship motions can be observed which make the propeller emerge from the water, and decrease its thrust as a consequence. The article presents a simplified method for calculating the thrust decrease and the time of propeller emergence from water for the ship on a regular an irregular wave. The method can be used for predicting the operating speed of the ship on a given shipping lane.

Słowa kluczowe

EN

ship motions on rough water; propeller emergence; thrust decrease

• Wydawca: Gdańsk University of Technology, Faculty of Ocean Engineering & Ship Technology
• Czasopismo: Polish Maritime Research
• Rocznik: 2014
• Tom: nr 2
• Strony: 27--33
• Opis fizyczny: Bibliogr. 12 poz., rys., tab.

Twórcy

autor

Żelazny K.

• Faculty of Marine Technology, Szczecin University of Technology, Al. Piastow 41, 71-065 Szczecin, POLAND, phone: [phone]

Bibliografia

• 1. Dudziak J.: Theory of ship (in Polish), Foundation for Promotion of Shipbuilding and Maritime Economy, Gdansk 2008
• 2. Faltinsen O. M.: Sea Loads on Ships and Offshore Structures, Cambridge University Press, Cambridge 1990
• 3. Lubieniecki M.: Calculating hydrodynamic forces generated on the propeller as a result of motion on wave (in Polish), Ph.D. thesis, Institute of Fluid-Flow Machinery PAS, Gdansk 1996
• 4. Minsaas K. J., Thon H. J., Kauczyński W.: Influence of Ocean Environment on Thruster Performance, Proc. Int. Symp. Propeller and Cavitation, 1986, pp.124÷142
• 5. Szantyr J. A.: Method for Analysis of Cavitating Marine Propellers in Non-uniform Flow, Intern. Shipbuilding Progress, Vol. 41, No. 427, 1994
• 6. Szelangiewicz T.: Seakeeping in cargo vessels design, 14th International Conference on Hydrodynamics in Ship Design, Szczecin-Międzyzdroje, Poland, September 27-29 2001, pp. 324÷334
• 7. Szelangiewicz T., Żelazny K.: Prediction of the influence of emergence of propeller on the propeller thrust reduction during ship navigation on waves, EXPLO-SHIP 2010, Zeszyty Naukowe nr 21(93), Szczecin Maritime University, Szczecin 2010, pp. 10÷13
• 8. Szelangiewicz T., Żelazny K.: The propeller thrust and speed reduction as a result of the propeller emergence on a given ocean route, EXPLO-SHIP 2010, Zeszyty Naukowe nr 22(94), Szczecin Maritime University, Szczecin 2010, pp. 63 ÷ 66
• 9. Cummins W. E.: The impulse response fluction and ship motions, Shiffs-technik, Vol. 47, No. 9, January 1962, pp.101÷109
• 10. Faltinsen O. M.: Sea Loads on Ships and Offshore Structures, Cambridge University Press, Cambridge 1990
• 11. Ogilvie T. F.: Recent progress towards the understanding and prediction of ship motions, Fifth Symposium of Naval Hydrodynamics, Bergen 1964
• 12. Szelangiewicz T.: Fundamentals of the theory of designing anchor systems for position keeping of watercraft, Okrętownictwo i Żegluga, Gdańsk 2005.