| 摘要 |
PROBLEM TO BE SOLVED: To provide a wind turbine blade capable of suppressing an increase in aerodynamic load from wind acting on the wind turbine blade, suppressing degradation in aerodynamic performance, and suppressing an increase in weight load acting on the wind turbine blade by decreasing the number of spar caps necessary for attaining a desired section modulus even if a wind turbine is made larger in size.SOLUTION: At least part of an area, in which at least one shear web is present, of a blade tip end includes a profile satisfying the following three conditions: (a) a blade thickness ratio is 19% or more and 23% or less; (b) a ratio X/C of a cord direction length Xbetween a leading edge and a maximum blade thickness position to a cord length C is 0.28 or more and 0.32 or less; and (c) and a ratio t/tof a blade thickness tto a maximum blade thickness tis 0.51 or more and 0.56 or less, where tis a blade thickness at a position of a median between the maximum blade thickness position and a rear edge. |
