| 摘要 |
Aplurality of slots (10, 11, 12, 13) with different widths are provided in a plurality of line on a stationary blade surface. More specifically, the steam turbine stationary blade (1) has a hollow nozzle with a penetrating space, which is connected with a diaphragm outer ring (2) or inner ring (3), and a plurality of suction slots (10, 11, 12, 13) extending radially which are arranged on the blade surface. At a position where a water film deposited to the blade surface is thick, the width of a slot (10, 12) is smaller and at a position where the water film is thin, the width of a slot (11, 13) is larger. |
