| 摘要 |
PURPOSE:To prevent separation of water flow and generation of secondary flow in the turning flow path of the multistage hydraulic machine by a method wherein a turning blade is provided in the U-turn flow path of the turning flow path while the blade having smaller declining angle is provided in the radial flow path thereof. CONSTITUTION:A plurality of first turning blades 21 are provided in the radial flow path 15 of the turning flow path 10 connecting the runner chambers 8, 9 of high pressure and low pressure stages with intervals circumferentially. The same number of second turning blades 22 are provided in the U-turn flow path 16. The first turning blades 21 are provided with the angle of 90 deg. substantially with respect to the upper and lower flow path wall surfaces of the side face 21a of the blade while the second turning blades 22 are provided from the inside stream line 18 to the outside stream line 17 with angles changing smoothly along respective stream lines. |
