Wind turbines are one of the machines that currently still used to convert wind kinetic energy so they can be by humans such as drive pumps in agriculture and produce electrical energy. Savonius turbine is a vertical axis widely an generator, this type drag has simple design form semicircular curved blade side. Therefore, author interested researching resulting performance including rotational ...

In this study, the improvement of turbine performance Savonius, one vertical axis wind turbines, was carried out numerically. The numerical approach used in studies supported by experimental results and confirmed. Within scope improvement, a collector placed front zone to decrease negative moment on counter-rotating blade Savonius turbine. To obtain highest performance, all changes design param...