| 摘要 |
<p>An axial fan (1) rotating in a plane (XY) about an axis (2) comprises a central hub (3),a plurality of blades (4), which have a root (5) and a tip (6), the blades (4) beingdelimited by a convex leading edge (7) and by a concave trailing edge (8), theirprojections in the fan rotation plane each being formed by circular arc segments;the blades (4) are made from sections with aerodynamic profiles, each with decreasinglength and more curved from the perimeter to the hub.</p> |
