| 摘要 |
PURPOSE:To improve a gas turbine in its operating efficiency, by arranging such that while the head portion of blade and a blade body are respectively formed with a different material each other and a cooling air blow-off port is provided along the boundary surface thereof, the width of blade is made smaller at the boundary surface than at the head portion of blade. CONSTITUTION:A plurality of stationary blades 1 are arranged in an annular configuration and comprise a blade body 2 made of heat resistant alloy and the ceramics head portion 3 of blade provided at a forward edge for preventing the flow of main stream gas. These two elements 2, 3 are formed such that their boundary surface may be convexed at the blade body 2 side. On the other hand, the interior of blade body 2 is partitioned by a partition wall 6 for defining two hollow portions 4, 5 which communicate with a cooling air source. One hollow portion 4 communicates with a cooling air blow-off port 7 and furthermore with a cooling air blow-off passage 8 defined along the boundary surface of these two elements 2, 3. The hollow portion 4 is opened at opposite sides of stationary blade 1. The width l of the blade is made smaller by the size of notched portion 10 at the blade body 2 than the width L of blade at the blade head portion 3. |
