| 摘要 |
PROBLEM TO BE SOLVED: To provide a high-performance turbine small in an the amount of fluid leaking downstream of rotor blades. SOLUTION: The turbine 1 includes a stationary annular body 11, a shaft body rotatably provided inside the stationary annular body 11, and the rotor blades radially provided in a plurality on the shaft body, in which an end 51 of each rotor blade faces the inner periphery 11b of the stationary annular body 11 with a gap G. Either the end 51 of the rotor blade or the inner periphery 11b of the stationary annular body 11 is provided with a plurality of steps 52 so as to gradually separate from the other from an upstream side, in an axial direction toward a downstream side, and the other is provided with a plurality of seal fins 15, which extends individually for the respective steps 52 and, respectively, form a minute gap m with downstream-side edges 53 of the respective steps 52. A space between two seal fins 15, axially adjoining each other forms an energy damping chamber R for making a fluid S flowing into the gap G diffuse radially. COPYRIGHT: (C)2011,JPO&INPIT
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