Dominicus Danardono Dwi Prija Tjahjana

TL;DR: In this article, the effect of the diameter ratio and the blade number on the performance of a cross-flow wind turbine was studied in two dimensional (2D) computational fluid dynamics (CFD) simulation method using the ANSYS-Fluent software.

TL;DR: In this paper, the authors review the cavitation phenomenon on ship propellers, which have been performed in previous research and discuss several techniques to obtain reliable observation and prediction of cavitation inception, related to the adverse effect on material damages.

TL;DR: From the experiment, the controller was observed as able to perform as expectation theorized, measured through the output voltage and sensor inputs, however, the MR brake torque continues to receive little acknowledgement which could be due to insufficient output torque.

TL;DR: In this article, the effect of adding extra layers on concave blades on the performance of the Savonius wind turbine model was investigated, and it was concluded that adding the multiple layer blades enhanced the performance.

Abstract: Water is one of the renewable energy sources that can replace fossil energy sources for supplying electricity needs. Savonius water turbine is capable of operating at a low rotational speed and suitable for hydroelectric power plants using limited water head at wastewater pipe in the high rise building. However, this turbine has disadvantages at low power and torque coefficient. Research has been carried out to improve the performance of the turbine, such as varying the number of blades and angles of curvature in the prototype U-type turbine rotor. This study discusses the process of designing and testing a prototype of L type turbine rotor with three variations of blade arc angle; 120°, 135° dan 150°. The result shows that type L turbines with arc 135° blade angles have the highest power coefficient of 27% on a TSR of 1,32 compared to others. 