Steam Turbine

Abstract: This steam turbine comprises a rotor shaft, a plurality of moving blade rows, a casing, and fixed blade rows disposed on a first side in the axial direction, relative to each of the plurality of moving blade rows. The last fixed blade row, disposed furthest on a second side in the axial direction among the plurality of moving blade rows, comprises: a plurality of fixed blades disposed at intervals in the circumferential direction and each extending in the radial direction; an outside ring having an annular shape and being disposed on the outside, in the radial direction, of the plurality of fixed blades; and an inside ring having an annular shape and being disposed on the inside, in the radial direction, of the plurality of fixed blades. A second-side edge on the second side, in the axial direction, of the fixed blades: is formed on the inside in the radial direction, relative to an intermediate position between an outside end on the outside, in the radial direction, of the fixed blades and an inside end on the inside, in the radial direction; and has an S shape having a second-side protrusion that curves towards the second side in the axial direction and a second-side recessed section that is formed on the outside, in the radial direction, relative to the intermediate position and is curved and recessed to the first side in the axial direction.

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