| 摘要 |
PROBLEM TO BE SOLVED: To reduce a temperature rise resulted from a horse-shoe vortex in the blade part of an axial flow turbine to prevent its burning. SOLUTION: A protruding part 16 protruded to the front is formed in a position aligned to the axial direction of a moving blade 11 and the axial flow turbine at the front edge 13 of a platform 12 having the moving blade 11 formed thereon. The interference of the main flow 31 of a working fluid with the horse-shoe vortex 15 is arrested by the presence of the protruding part 16, and the burning of the front edge 13 by the leak of the working fluid to the front edge 13 can be prevented. A stationary blade 21 has a cooling air passage in the inner part to blow out cooling air backward from a film cooling air outlet 23 or a pin fin cooling air outlet 24. These air outlets are constituted so that the ratio of the air quantity carried to the root part of the moving blade 11 located in the rear is increased. COPYRIGHT: (C)2004,JPO
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