The system has processing systems (20, 30) to calculate control signals (SC20, SC30) based on set point values different from a value (VC10) which is representative of distance in a gas turbine. A selector (50) selects the control signals for controlling a...

Blade ring cooling passages (14, 15) are provided inside a first blade ring (8) and a second blade ring (9). The blade ring cooling passages (14, 15) are connected with each other through a communication pipe (16) that is arranged in an axial direction of ...

The steam-cooling-type gas turbine is provided with communication passages in number equal to that of the front-stage stator blades and the rear-stage stator blades. Many communication passages are placed in the blade ring densely. As a result, in the blad...

Gas turbine blade ring is cooled by steam of which temperature, pressure and flow rate are controlled so that clearance between moving blade tip and blade ring is maintained appropriately. Steam from steam turbine bottoming cycle (10) flows into blade ring...