| 摘要 |
<p>An axial fan which comprises a plurality of vanes (2, 2, ...) provided on an outer periphery of a hub. A cross section of each vane (2) at any distance from the center of the fan is shaped in such a manner that a vane thickness gradually increases from a vane leading edge (2a) and gradually decreases toward a vane trailing edge (2b). L/L0 is set in the range of 0.27 to 0.35 where L designates a camber line length from the vane leading edge (2a) at a position where the vane thickness is maximum, and L0 designates a camber line length between the vane leading edge (2a) and the vane trailing edge (2b) at the above any distance. Thus an aerodynamic performance is prevented from being reduced even if an inflow angle of air relative to the vane (2) is varied.</p> |
