Arifin Sanusi, Sudjito Soeparman, Slamet Wahyudi, Lilis Yuliati
Many modifications have been made on conventional Savonius wind turbine's rotor blades have been made to improve the performances. The rotor blade modification in this research is a blade combination where the circle-shaped conventional model is combined with the one of a concave elliptical model. The combined blade will not affect the simplicity of construction and cost of manufacture of turbine rotors. The aim is to analyze the influence of the blade combination towards the performance of Savonius turbine. The research includes experimental method using open-jet-type wind tunnel of rotor's prototype with three different blade models of the same dimension. The experiment shows, there are influences of the modification of the rotor blade to the performances of the turbine. The combined blade improves the performances of the power coefficient maximum (Cpmax) up to 11 % compared to the conventional blade at the tip speed ratio (TSR) of 0.79.
Department of Mechanical Engineering, Brawijaya University, Jalan MT. Haryono 167, Malang, 65145, Indonesia; Department of Mechanical Engineering, Nusa Cendana University, Jalan Adi Sucipto, Kupang, 85001, Indonesia
