Abstract
A Savonius Rotor is low efficiency. But it is considered that the windmill is suitable for the use in the city area because it can make the projection area looked from the upper part small. In this study, we focus attention on its blade shape, and examine influence on efficiency improvement from torque, blade surface pressure distribution and flow visualization on static condition. The blade shape is four blade types of blade height. As a result, there was not much difference of pressure and flow on four type blades, but there was difference of torque. It is considered that key factor of the difference is geometric influence.
