Steam Turbine

Abstract: This steam turbine is provided with a rotor shaft which rotates about an axis, a plurality of rows of moving blades which are fixed to the outside, in the radial direction, of the rotor shaft, and which are disposed spaced apart in the axial direction along the axis, a casing disposed in such a way as to cover the rotor shaft and the plurality of rows of moving blades, and rows of stationary blades which are fixed to the inside, in the radial direction, of the casing, are disposed spaced apart in the axial direction, and which are disposed on a first side, in the axial direction, of each of the plurality of rows of moving blades, wherein the rows of stationary blades are provided with: a plurality of stationary blades which are disposed spaced apart in the circumferential direction, and each of which extends in the radial direction; an outer ring which is annular, and which is disposed on the outside of the plurality of stationary blades in the radial direction; an inner ring which is annular, and which is disposed on the inside of the plurality of stationary blades in the radial direction; recessed portions which are formed in a ring inner circumferential surface that faces inward, in the radial direction, in the outer ring, and which are recessed outward, in the radial direction, between the stationary blades that are adjacent to one another in the circumferential direction; and discharge portions which open in the recessed portions, to discharge droplets that have accumulated in the recessed portions to the outside.

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