| 摘要 |
A wind turbine comprising multiple inner vanes 21, 22, 23 rotating about a central axis and a second set of outer stationary vanes 24, 25, 26 surrounding the inner vanes to obscure them from view. Preferably the outer vanes provide a narrowing passage, to increase the speed of the air entering the turbine, and the inner vanes are concave shaped to create an aerofoil effect. The fixed outer vane structure may also deflect air from the oncoming blades of the inner turbine and create a low pressure zone in the air behind the turbine. These two aspects combined with the aerofoil section of the inner turbine vanes also make the device more efficient that known vertical axis wind turbines. |
