| 摘要 |
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 ) being delimited by a convex leading edge ( 7 ) and by a concave trailing edge ( 8 ), their projections in the fan rotation plane each being formed by circular arc segments; the blades ( 4 ) are made from sections with aerodynamic profiles, each with decreasing length and more curved from the perimeter to the hub. |
