| 摘要 |
PROBLEM TO BE SOLVED: To provide a blade body effectively suppressing bending stress caused by thermal deformation. SOLUTION: This blade body 6 has an airfoil cross-sectional surface formed by continuously forming a recessed positive pressure surface 21 and a projecting negative pressure surface 22 through a leading edge 20a and a trailing edge 20b, and includes a plurality of cooling holes 25a-25k as flow passages for cooling fluid, which extend in a blade height direction intersecting with the airfoil cross-sectional surface and arranged from the leading edge 20a toward the trailing edge 20b. The cooling holes 25a-25k have the first reference cooling hole 25a formed closest to the leading edge 20a and the second reference cooling hole 25k formed closest to the trailing edge 20b within a range ensuring necessary thickness, and the other cooling holes 25b-25j are formed between the first reference cooling hole 25a and the second reference cooling hole 25k so that a temperature difference in a center area T3 positioned between a front area T1 and a rear area T2 is small with respect to the front area T1 including the first reference cooling hole 25a and the rear area T2 including the second reference cooling hole 25k. COPYRIGHT: (C)2011,JPO&INPIT |
