The hydrodynamic resistance of stepped planing hulls under different geometrical and physical conditions

• Autorzy: Najafi Amin , Nowruzi Hashem , Salari Mahmoud , Kazemi Hamid

Identyfikatory

DOI

10.17402/333

• Języki publikacji: EN

Abstrakty

EN

In this paper, the hydrodynamic resistance of one-step planing craft has been experimentally investigated under different geometrical and physical conditions. For this to be accomplished, a Fridsma body model with different deadrise angles was considered. Moreover, the effect of the longitudinal distance of the step from the transom and the step height on the hydrodynamic resistance of a stepped planing craft has been evaluated at different hull velocities. According to the experimental results, frictional resistance can be enhanced by decreasing the height of the step. However, a greater total resistance can be obtained by increasing the longitudinal distance of the step from the transom. Moreover, it was found that the proportionality of the longitudinal distance of the step from the transom to the step height has a remarkable effect on the hydrodynamic efficiency of the step in stepped planing craft.

Słowa kluczowe

EN

towing tank test; planing hull; transverse step; hydrodynamic resistance; Fridsma; height of the step

• Wydawca: Wydawnictwo Naukowe Akademii Morskiej w Szczecinie
• Czasopismo: Zeszyty Naukowe Akademii Morskiej w Szczecinie
• Rocznik: 2019
• Tom: nr 58 (130)
• Strony: 24--31
• Opis fizyczny: Bibliogr. 21 poz., rys., tab.

Twórcy

autor

Najafi Amin

• Imam Hossein University, Department of Mechanical Engineering, Tehran, Iran

autor

Nowruzi Hashem

• Amirkabir University of Technology (Tehran Polytechnic), Department of Maritime Engineering 424 Hafez Ave, P.O. Box 15875-4413, Tehran, Iran

autor

Salari Mahmoud

• Imam Hossein University, Department of Mechanical Engineering, Tehran, Iran

autor

Kazemi Hamid

• Imam Hossein University, Department of Mechanical Engineering, Tehran, Iran

Bibliografia

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Uwagi

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