SERRATED FAN BLADE, AND AXIAL FLOW FAN AND CENTRIFUGAL FAN EQUIPPED WITH SAID FAN BLADE

摘要

A trailing edge 44 of the serrated fan blade 40 according to the present invention has a notch row 50 that includes a first notch N1, a second notch N2, and a third notch N3 which are lined up adjacently in one row. The first notch N1 and the second notch N2 form a first serration S1 therebetween, and the second notch N2 and the third notch N3 form a second serration S2 therebetween. The second notch N2 has the deepest or the shallowest depth among the depths of the first through third notches N1-N3, and the first and second serrations S1, S2 each have an asymmetrical shape.