Numerical analysis of the influence of fixed hydrofoil installation position on seakeeping of the planing craft.

• A bow hydrofoil is designed to improve the seakeeping of the planing craft in regular waves at the high speed. • The seakeeping performance of planing craft is predicted, and the numerical method is verified reliable. • The influences of installation height and attack angle are analyzed and the suitable parameters are selected. • The influence of the speed on the effect of the hydrofoil is analyzed through comparison with the bare vessel. This paper analyzes the hydrodynamic performance of a planing craft with a fixed hydrofoil in regular waves. Numerical simulations are carried out based on a RANS-VOF solver to study the hydrodynamic performance of the planing craft and the influence of the fixed hydrofoil on its seakeeping. To validate the numerical method, a series of hydrodynamic experiments of a bare planing craft without the hydrofoil were carried out, from which the seakeeping performance of the planing craft was recorded, the numerical method based on overset grid was compared with the experiment and verified reliable. Eight hydrofoil design cases were then studied, whereby, their seakeeping performance in regular wave conditions were predicted through the numerical method which has been verified reliable and compared with each other. Effects of hydrofoil parameters, such as angle of attack and installation height, on the seakeeping performance were investigated. Finally, the suitable installation parameters which can optimize the performance of hydrofoil and reduce the negative influence are verified. The influence of the speed on the effect of the hydrofoil and the flow field around the planing craft are also investigated. [ABSTRACT FROM AUTHOR]