| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a wind turbine blade that enhances performance by a winglet formed at a blade tip. <P>SOLUTION: The wind turbine blade 1 includes a winglet 3 formed by bending a tip end thereof toward a blade ventral side 7 with respect to an adjacent section 9 adjacent to a blade root side. A CANT angle which is an angle formed by the blade axial line 13 of the winglet 3 and a radial extrapolation line 11a of the blade axial line 11 of the adjacent section 9, is 15° or more and 55° or less. The winglet 3 includes: a tip end 3a located in the tip end side of the winglet and having a substantially linear blade axial line 13; and a bent section 3b located in the base end side of the winglet and bent with respect to the adjacent section 9. The bent section 3b is gradually bent so as to satisfy the predetermined CANT angle. <P>COPYRIGHT: (C)2012,JPO&INPIT |
