| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a blade having favorable characteristics, preventing vortexes of fluid such as a vortex easily generated at a distal end of the blade due to separation of the fluid and a trailing vortex. Ž<P>SOLUTION: A body, a lateral face 12, a guide face 13, and a flow straightening element 15 having a streamlined outer surface with a prescribed diameter are formed on an end part 5 of a blade body 3 having an upper face 1 and a lower face 2 to compose the sturdy blade 16. Part of the fluid flowing near a front end of the flow straightening element 15 is guided by the lateral face 12 and the guide face 13 to the lower face 2 and the upper face 1 of the blade body 3. Thus, the fluid flowing near the front end part of the blade 16 smoothly flows closely along the surface of the blade 16 without crossing or colliding with each other. Accordingly, generation of the vortex of the fluid is prevented to promote increase of lift, reduction of drag or the like of the blade 16. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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