Blade force measurement and flow visualization of Savonius rotors.

@inproceedings{Sawada1985BladeFM,
  title={Blade force measurement and flow visualization of Savonius rotors.},
  author={Tadashi Sawada and Masahide Nakmura and Shin Kamai},
  year={1985}
}
The mechanism of rotation of Savonius rotors which have two semicylindrical blades is studied experimentally. The force acting on a blade is measured in a water tank for both cases where a rotor is at rest and where it is rotated. A flow around the rotor is observed by using aluminum powder floating on the water surface. Although the Savonius rotor is classified as a resistance type, the lift produces a torque in a pretty wide range of blade angles relative to the flow.