| 摘要 |
PURPOSE:To aim at enhancing the cooling effect of a blade, by forming slits for blowing out cooling air in the back side of the blade. CONSTITUTION:Slits 7, 13 for blowing out cooling air are formed in the back side 3 of a blade 1. Cooling air which is blown onto the inner surface of the leading edge section of the blade perpendicularly thereto within the blade 1, blows out through the slit 7. Cooling air which is fed in a passage in the intermediate section of inside of the blade, blows out through the slit 13. With this arrangement the back side 3 of the blade 1 may be covered with a cooling air film, thereby it is possible to enhance the cooling effect. |
