Stern foil is an innovation that can be used on high-speed vessel craft. This innovation uses the same principles as interceptor but using hydrofoil. Interceptor are used to reduce the wetted surface area of the transom by making vortex under the transom, this kind of change will increase speed and reduce the total resistance of the ship. The mechanism on how the stern foil reduces the total resistance is an interesting question in term of ship hydrodynamics. This study aims to analyse the resistance reduction on high-speed patrol vessel by application of stern foil using simulation model. The study was carried out using computational fluid dynamics (CFD) with hydrodynamic parameters using a variation of the angle of attack 3˚ and 0˚ on Froude number range 0.6-1.3 with service load at 2 kg. The simulation result was obtained the optimal work for stern foil is at service load (2 kg) is a reduction in the total resistance of about 26,70% with the angle of attack is 0˚ in Froude number 0.9.
In the marine industry, specifically fast patrol boats, the important objectives are reducing resistance and improving the efficiency of ships' propulsion systems. The aim of this research was to investigate the application of a stern foil on a patrol boat through experimental and simulation methods. The stern foil used to generate a lift force was an asymmetrical National Advisory Committee for Aeronautics (NACA) foil. In the experiment, the stern foil was installed below the transom of a ship model and positioned parallel to the keel direction (3°towards x-axis). This position created a resultant force, which had an angle to the x-axis. There were variables in this experiment, such as the stern foil application, Froude number (Fr) and hull loads. Those combinations of variables generated sufficient data to analyse the effect of the stern foil working in various conditions. At an optimal load condition (half full load, 2 kg) and Fr 1.1 in the experiment and simulation, the ship model had a resistance reduction of as much as 22.3% and 23.3% in stern foil applications. In addition, with different setups of the stern foil (0°towards the x-axis) in the simulation, a resistance reduction of about 26.7% occurred at Fr 0.9.
Currently in the ship design industry, especially for the patrol boat design and development, researchers continue to try to find designs with high efficiency and good performance. The use of stern foil technology by reducing ship resistance on ships is a way to increase ship performance. This Stern Foil technology has a similar working principle with hydrofoil, but Stern Foil is only located on the stern of the ship. By reducing the wet area at the stern of the ship, it will automatically reduce resistance and have an impact on the characteristics of the ship. The research on the application of Stern Foil was carried out on a 1-meter dimension ship model with a towing test method. The results of this research indicate a change in the characteristics of the ship, starting from the wave pattern created and there are reductions in the total resistance of the ship model, 24.84 % on 2 kg with Fn 1.2 and 1.27% on 3 kg with Fn 0.7-0.75.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.