| 摘要 |
PURPOSE:To enable a tongue position to be varied in assemblage for freely increasing and decreasing turbine capacity by providing a tongue-shaped variable capacity member projecting toward a flow path on the rear side of a rotor disk to constitute the member integrally with a heat insulator. CONSTITUTION:When an insulator 14 provided with a long variable capacity member 10' is fixedly placed along the gas inflow direction as shown by the solid line, a flow characteristic curve FB is provided. When the insulator 14 provided with a short variable capacity member 10'' is fixedly placed along the gas inflow directions as shown by the broken line, a curve FC is obtained. In the case of only a fixed tongue portion IC without the variable capacity member 10, a curve FA is obtained. An insulator 10 can be freely selected in assemblage so that the increase and decrease of turbine capacity can be freely set. |
