Penambahan Winglet Campuran Pada Turbin Angin Darrieus Tipe H Untuk Peningkatan Kinerja Turbin Angin

Abstract

Vertical axis wind turbines (VAWT) have increasing in recent years because the potential effective use of wind energy. VAWT rotating vertically against the wind will produce a tip vortex. The tip vortex of the VAWT blade has a negative impact on power efficiency. This study is purpose to validate the aerodynamic effects of adding winglets to VAWT blades. This study directly studied the aerodynamic effect of adding winglets to the VAWT blade. From visual observation of the wind tunnel, there are differences in fluid flow that occur after the addition of winglets on the blade. This method consists of two comparisons between blade with winglet and without winglet The experimental results show that there is a positive effect of VAWT with the addition blended winglet indicating that the optimal winglet can reduce tip vortices and increase the performance of the power turbine. Turbine power increases to 11% at the tip speed ratio 2,02 in the case of full-scale VAWT compared to blades with winglets, the average increase in torque after adding winglets to three blade turbine is 13.2% The winglets help maintain the pressure difference between the three blade sides, which results in the weakening of the tip vortex and increasing turbine efficiency by reducing drag on the blade.