| 摘要 |
PROBLEM TO BE SOLVED: To provide a wind turbine blade in which restriction of blade tip vortex and occurrence of lift force are executed compatible with each other under a high performance.SOLUTION: This invention provides a wind turbine blade characterized in that a curved segment 3 is formed by extending a sectional shape at an end part 2c of a main wing part 2 along a curved line having a prescribed curvature factor and bending it. A slant part 4 is formed by extending a shape of an outer surface 3a formed in curve at an outside in the sectional shape of an upper side end part 3c of the curved segment 3 along a curved line having a prescribed curvature factor and a shape of an inner surface 3b is formed in curve by extending it along a curved line having a smaller curvature factor than that of a curved line reflected against the outer surface 3a. A side surface outer contour edge line of the slant part 4 is formed by a crossing line 5 formed by crossing between an outer surface 4a and an inner surface 4b.SELECTED DRAWING: Figure 1 |
