Numerical Analysis of Appropriate Hydrofoil for Catamaran Watercraft

In catamarans high-speed, different ways are used to reduce drag and increase operating speed. Using hydrofoil is known as an effective method to reduce drag. The aim of this research is to select an appropriate hydrofoil for a catamaran which is done in four steps. Initially, 48 standard hydrofoils are selected from the NACA and Eppler series and examined as single-phase at different angles of attack; then by choosing the lift to drag ratio as the target parameter, four superior hydrofoils are selected and simulated in FLUENT software in three-dimensional and free surface flow conditions, that ended in selection of two of the most effective hydrofoils. In the next step, these two hydrofoils has been modeled by considering cavitation. Finally, the best hydrofoil is selected and presented for catamaran which has the ability to provide required lift in the free surface and cavitation conditions.