| 摘要 |
The present invention is a hollow turbine blade, equipped with: a back-side wall, a portion of the inner wall surface of which is exposed at the rear edge, with cooling air flowing along the inner wall surface at the aforementioned exposed area; and recesses provided in the inner wall surface at the aforementioned exposed area. When viewed from the direction of the normal line to the inner wall surface of the back side wall, the contour of the recesses (5) is set in a shape that is symmetrical around a reference line (L) intersecting the direction of the aforementioned flow of cooling air, and that broadens along the reference line (L). |
