The analysis of viscous resistance towards various configuration of angle of attack and chord length of the foil towards the creation of the bubble on drag reduction of the ship on winged air induction pipe using computational fluid dynamics

Pollution is a main focus in the status quo of global warming. One of those main contributors is the shipping industry. Massive usage in fuel oil by the ship around the world, especially the container and tanker ship produce more than 40% of total world pollution. Many research has been done to solve this problem, such as main fuel conversion also by increasing the efficiency of the ship itself. One of those methods which increasing the efficiency is the air lubrication method by increasing the drag reduction of the ship. In this research, we used the device called as Winged air induction pipe (WAIP) to lubricate the bottom of the ship. This device using foil to create bubbles by making low pressure area in the upper area of the foil which will suck the atmospheric air through the pipe and trap those air inside the flow which will became bubbles. In the previous research the same method has been done, but the explanation about how the various configuration of chord length and the effect of viscous resistance will affect the creation of the bubbles were not explained yet. In this research, we used numerical simulation by using ANSYS CFD-Fluent with k-w SST (Shear Stress Transport) method. At the end the error occured only 1,49 % compared with experimental research done by previous studies. This research also used the same NACA 653-618 which has been used by previous study within the addition of variation of the chord length of the foil. At the end of the research, there is a tendency between viscous resistance and net power saving by the device, which is at 6% of total power saving.