| 摘要 |
PROBLEM TO BE SOLVED: To maintain a suitable service life without impairing performance and efficiency so as to prevent early damage by providing each vane with an arcuate part for building up pressure of combustion gas adjacent to an inner band, along a trailing edge, and arranging a heat insulating spray deposit selectively only along a suction side face between a leading edge and the trailing edge. SOLUTION: Each vane 32 comprises a leading edge 34 and a trailing edge 36 spaced in the axial direction, an axially recessed pressing side face 38, and a suction side face 40 circumferentially protruded on the opposite side. Both the pressing side face 38 and suction side face 40 are axially extended between the leading edge 34 and the trailing edge 36. Each vane comprises a curved part or an arcuate part 46. The arcuate part 46 appears most distinctly along the trailing edge 36 and acts to increase the total pressure of combustion gas 20 adjacent to an inner band 30 at the root 42 of the vane. A heat insulating spray deposit selectively arranged only along the suction side face 40 between the leading edge 34 and the trailing edge 36 is provided to reduce or eliminate an exfoliation problem. |
