| 摘要 |
A screw turbine device ( 1 ) comprising at least one helical blade ( 4 ) that is rotatable about an axis ( 6 ), the cross section of the blade ( 4 ) being in the shape of the profile ( 15 ) of an aeroplane wing, and where the aeroplane wing-like profile ( 15 ) projects from the outer radial extent of the blade ( 4 ) and in to the shaft ( 2 ) of the screw turbine ( 1 ). |
