SEAKEEPING PERFORMANCE OF A HYDROFOIL IN WAVES USING CFD APPROACH

Abstract

Hydrofoil usually experiences high resistance and excessive vertical motions (heave and pitch) that may affect the passenger’s comfort due to the harsh environmental condition. Therefore, it is necessary to investigate seakeeping performance of a hydrofoil ship in waves due to the presence of a complex hydrodynamic phenomenon. To achieve this objective, an analysis of Computational Fluid Dynamic (CFD) approach on a hydrofoil ship motion is proposed. Several parameters such as Froude Number and foil angle of attack have been taken into account. The results revealed that the subsequent increase of Froude Number was inversely proportional to the heave and pitch motions. Inherently, these have led to an upgrade of hydrofoil seakeeping performances presented in the form of high Response Amplitude Operators (RAO). Furthermore, the increasing angle of the foil bow was proportional to the heave motion while for the foil stern, 7.5o showed lower heave motion, then followed by 5o and 10o respectively. For the pitch motion, the increase of foil bow was lower at 5o then followed by 10o and 7.5o. The increase of the foil stern was proportional to the pitch motion experiences by a hydrofoil. In general, this CFD simulation is very beneficial to ensure operational effectiveness of hydrofoil design in high sea states with respect to the aforementioned design parameter.