| 摘要 |
<p>A rotor 10 for a horizontal axis wind turbine, comprises a hub 12 and a number of elongate blades 14 extending radially from the hub 12, the blades 14 being shaped such that in operation, at any selected radial position along the length of the blades 14, the ratio of air whirl velocity Cu leaving the blades 14 in the direction of blade rotation divided by axial wind speed upstream of the rotor VA is given by: C?= 4 VA 9? where ? is the local speed ratio at the selected radial position and is given by ????U VA and where U is the circumferential blade speed at the selected radial position. The rotor can be used for a small, low speed wind turbine.</p> |
