| 摘要 |
<p>Each vane on a cross-wind turbine rotor is airfoil-shaped in cross section orthogonal to the axis of rotation of the rotor. Each vane has a radially outermost surface, which is radially outermost relative to the axis of rotation, and an opposite radially innermost surface. The radially innermost surface includes aerodynamic surface features chosen from the group comprising: (a) dimples, so as to increase surface area drag of each vane during the downwind leg and so as to decrease drag of each vane during the upwind leg, (b) scales so as capture a backwind over the vane to increase surface area drag during the downwind leg of each vane, (c) micro-lines across each vane in a direction substantially perpendicular to the longitudinal axis of each vane.</p> |
