Studi Numerik Pengaruh Variasi Rasio Diameter Silinder Sirkular Terhadap Performa Turbin Angin Savonius Overlap

Abstract

- Experimental research on the performance of savonius wind turbine has been carried out
with additional overlap ratios and various diameter ratio of circular cylinder in front of returning
blade. The validation of experimental results can be displayed by making numerical study research
with Computational Fluid Dynamics (CFD) method. This method can also be used to obtain
coefficient of power. Numerical studies were conducted using savonius wind turbines with 0,3 overlap
ratio and also 0,4 meter of diameter and height. The various of circular cylinder diameter is ds/D =
0,3; 0,4; 0,5; and 0,6. The wind speed is set at 5 m/s. The highest increase of performance savonius
overlap wind turbines is 3,51% in the variations of ds/D = 0,4 to savonius overlap wind turbines
without circular cylinder with 0,324 coefficient of power (Cp) at Tip Speed Ratio 1.