| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a gas turbine blade, of which blade pedestal withstands, particularly, high temperatures, and which requires a small amount of cooling air. SOLUTION: In a front edge region of the blade pedestal 3, a slit 15 extending in parallel with a front edge region 9 of the blade pedestal is formed by erosion processing. The cooling air 25 is introduced from a lower face 8 of the blade pedestal 3 into the slit 15, and the front edge region is collision-cooled by the cooling air. The cooling air 25 cools an upper face 7 of the blade pedestal 3 by film cooling, and then is exhausted. Therefore, a cooling system for effectively cooling the front edge region of the blade pedestal 3 is constituted. A passage 17 is formed by a laser beam driller, and a light scattering member 33 is disposed on a wall face 31 of the slit 15 to protect the wall face from a laser beam 37.</p> |
