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RANS SIMULATION OF HYDROFOIL EFFECTS ON HYDRODYNAMIC COEFFICIENTS OF A PLANING CATAMARAN

Amin Najafi ; Sharif University of Technology, Azadi Ave., Tehran, Iran
Seif Mohammad Saeed ; Sharif University of Technology, Azadi Ave., Tehran, Iran


Puni tekst: engleski pdf 2.127 Kb

str. 43-66

preuzimanja: 650

citiraj


Sažetak

Determination of high-speed crafts’ hydrodynamic coefficients will help to analyze the dynamics of these kinds of vessels and the factors affecting their dynamic stabilities. Also, it can be useful and effective in controlling the vessel instabilities. The main purpose of this study is to determine the coefficients of longitudinal motions of a planing catamaran with and without a hydrofoil using RANS method to evaluate the foil effects on them. Determination of hydrodynamic coefficients by experimental approach is costly, and requires meticulous laboratory equipment; therefore, utilizing numerical methods and developing a virtual laboratory seems highly efficient. In the present study, the numerical results for hydrodynamic coefficients of a high-speed craft are verified against Troesch’s (1992) experimental results. In the following, after determination of hydrodynamic coefficients of a planing catamaran with and without foil, the foil effects on its hydrodynamic coefficients are evaluated. The results indicate that most of the coefficients are frequency independent especially at high frequencies.

Ključne riječi

Hydrodynamic Coefficients, Catamaran, foil, Computational Fluid Dynamics

Hrčak ID:

154715

URI

https://hrcak.srce.hr/154715

Posjeta: 1.247 *