To provide a nozzle cascade of an axial flow turbine capable of improving turbine performance by relaxing unevenness of the steam flow amount in the circumferential direction downstream of a partial feed-in stage and reducing a loss to be generated in a nozzle and a turbine rotor blade, and to provide an axial flow turbine.
A nozzle cascade of a steam turbine 10 includes: a partial feed-in stage nozzle cascade 20a having an operating fluid feed-in part 31 and a non-feed-in part 30 in the circumferential direction to partially feeding an operating fluid; and a nozzle cascade in a downstream stage arranged on a downstream side of the partial feed-in stage nozzle cascade 20a. Nozzle inlet height H1 as a height in the radial direction in an inlet of a nozzle structuring the nozzle cascade of the downstream stage is formed so that the height of a nozzle 16b1 positioning on a downstream side of the non-feed-in part 30 is higher than a height of a nozzle 16b2 positioning on a downstream side of the feed-in part 31.
TAKAE SHUNSUKE
SHIBUKAWA NAOKI
ONODA AKIHIRO
NOMURA DAISUKE
FURUYA OSAMU
TAKAHASHI TORU
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