Practical approach to calculating the hydrodynamic oscillating loads of a ship propeller under non-uniform wake field

• Autorzy: Ghassemi H.

Identyfikatory

DOI

[e-mail]

• Języki publikacji: EN

Abstrakty

EN

Propellers usually operate in the ship’s stern, where the inflow of the non-uniform wake generates oscillating loads and changes the hydrodynamic performance. Therefore, determination of the forces on propellers and hydrodynamic performance due to a non-uniform wake field are the challenging problems for naval architects and hydrodynamists. The main objectives of the present study are to assess the hydrodynamic performance for a single blade and all the blades. The propeller is a B-series propeller under non-uniform wake field behind the Seiun-Maru (hereafter SM) ship hull. A practical approach is employed to calculate the hydrodynamic oscillating loads of the ship propeller under a non-uniform wake field. Results of the computations on the propeller behind the SM ship, due to a non-uniform wake field, are presented and analyzed using classical mathematical methods over a single cycle. The results show that a variation of thrust with the discussed parameters is the same as that shown for torque, also the blade-frequency of the total force, thrust and torque is an increasing function of radial sections, whereas these parameters decrease with increasing radial blade sections.

Słowa kluczowe

EN

hydrodynamic performance; non-uniform wake; oscillating thrust and torque; practical approach; ship propeller; ship design

• Wydawca: Wydawnictwo Naukowe Akademii Morskiej w Szczecinie
• Czasopismo: Zeszyty Naukowe Akademii Morskiej w Szczecinie
• Rocznik: 2018
• Tom: nr 56 (128)
• Strony: 9--20
• Opis fizyczny: Bibliogr. 29 poz., rys.

Twórcy

autor

Ghassemi H.

• Amirkabir University of Technology (AUT), Department of Maritime Engineering Hafez Ave, No. 424, P.O. Box 15875-4413, Tehran, Iran

Bibliografia

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• 3. Abramowski, T. & Szelangiewicz, T. (2010) Numerical analysis of influence of ship hull form modification on ship resistance and propulsion characteristics. Part II: Influence of hull form modification on wake current behind the ship. Polish Maritime Research 1(64), 17, pp. 3–9.
• 4. Abramowski, T., Żelazny, K. & Szelangiewicz, T. (2010) Numerical analysis of influence of ship hull form modification on ship resistance and propulsion characteristics. Part III: Influence of hull form modification on screw propeller efficiency. Polish Maritime Research 1(64), 17, pp. 10–13.
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• 16. Kamarlouei, M., Ghassemi, H., Aslansefat, K. & Nematy, D. (2014) Multi-objective evolutionary optimization technique applied to propeller design. Acta Polytechnica Hungarica 11, 9, pp. 163–182.
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• 20. Mahmoodi, M., Ghassemi, H. & Nowruzi, H. (2018) Obtaining mathematical functions of the propeller thrust and torque coefficients fluctuations at non-uniform wake flow including geometry effects. Mechanics & Industry 19, 2, 205.
• 21. Martin, J.E., Michael, T. & Carrica, P.M. (2015) Submarine maneuvers using direct overset simulation of appendages and propeller and coupled CFD/potential flow propeller solver. Journal of Ship Research 59(1), pp. 31–48.
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• 26. Taheri, R. & Mazaheri, K. (2013) Hydrodynamic Optimization of marine propeller using gradient and non-gradient based algorithms. Acta Polytechnica Hungarica 10, 3, pp. 221–237.
• 27. Ueno, M. & Tsukada, Y. (2016) Estimation of full-scale propeller torque and thrust using free-running model ship in waves. Ocean Engineering 120, pp. 30–39.
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Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).