| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a turbine stationary vane having effects of suppressing increase of horseshoe shaped-vortex generated near a front edge of the vane, and further suppressing secondary flow in a region held by a negative pressure surface and a pressure surface.SOLUTION: An outer peripheral side end wall inner face 10 as a face at an inner peripheral side of an outer peripheral side end wall has inward projecting shape and outward projecting shape at a negative pressure surface side of a vane profile portion 12, an apex of the inward projecting shape is positioned near a front edge 12a of the vane profile portion, an apex of the outward projecting shape is positioned near the middle between a front edge 12a and a rear edge 12b of the vane profile portion 12, the inward projecting shape is formed from an upstream side in the gas flowing direction with respect to the front edge 12a, and in a region at an upstream side in the gas flowing direction with respect to the outward projecting shape, in which the inward projecting shape is formed, a region (curved line L_end) where radius positions of the outer peripheral side end wall inner face 10 are same on a plane vertical to a turbine rotating shaft, is formed.</p> |
