| 摘要 |
The invention relates to a rotating machine for interaction with a fluid medium, comprising a rotor with one or more blades with which energy is extracted from or relinquished to the medium. The blade extends helically or spirally along the rotor axis. The projection of the blade forms in the flat plane a continuously narrowing strip spiralling around a centre point. The blade is preferably membrane-like. As seen in side view the blade has a cone- shaped end situated on the downstream side of the fluid medium. |
