Numerical Prediction Of Foils Configuration In A Design of Buoy Glider System For Supporting Tsunami Early Warning

Abstract

Geographically, Indonesia is a disaster-prone country, with the potential to cause damage to public infrastructure not only cause enormous loss of life. Based on the tsunami risk map released by BNPB in 2018, it needs more attention so that mitigation can be implemented properly. It necessary to revitalize nationally developed by BPPT the buoy-based early warning system for tsunami disasters. Early generation tsunami buoy designs were successfully developed and operated in several waters in Indonesia. In order to improve the performance of the tsunami buoy, a new vehicle system known as the Wave Buoy Glider (WBG) is proposed. It is hoped that this WBG design can cover a wider monitoring area as well as more wave elevation measurement data related to tsunami events. In this research some of the buoy glider-design parameters such as sizes and configurations of foil are studied in order to obtain the optimal pulling force of the wave glider to the surface floater. A numerical calculation using the CFD technique is used to determine the hydrodynamic force. So that from this study, it can be seen that an increasing number used foils, the drag and lift forces also tend to increase. The larger the span foil, the greater the value of the drag and lift forces, especially at the larger AoA angle. The positive values of drag forces at any lift forces confirm that wave glider always move forward with every vertical movement of the floater.