| 摘要 |
<p>A rotary fluid dynamic utility structure (1) comprising at least two blades, wherein each blade comprises a multiplicity of elemental airfoils (S), a base, a tip (35), a face (14), a back (7), a leading edge (IS), a trailing edge (16), and a longitudinal twist. The at least two blades are equi-distantly attached to a hub, which has means for being attached to a rotating shaft. The structure (1) provides five significant improvements over previous blade structures. The first improvement is that the inventive blade's orientation is reversed, the second is that the elemental airfoils (5) are three- dimensionally profiled, the third is an improved blade tip (35) curvature design, the fourth is improved leading and trailing edge ranges, and the fifth is improved mass distribution of the blade.</p> |
