COOLING AIR SUPPLY STRUCTURE OF GAS TURBINE AND GAS TURBINE

摘要

The present invention includes an introducing passage (324) that is provided within a turbine vane (32) fixed within a turbine casing (31) and that communicates an interior of the turbine casing with an exterior thereof; a rotor cavity (334) that is provided in the rotor and that includes an opening along the circumferential direction of the rotor; a nozzle (326) that is provided in an inner circumference of the turbine vane in a manner that the nozzle communicates with the introducing passage and that includes an outlet (326a) facing the opening of the rotor cavity and a swirler (327) at the outlet; a brush seal (328a) provided between the turbine vane and the rotor; a cooling passage (336) provided within a disk (333) that is fixed to the rotor and rotates therewith and that fixes a turbine blade (33); and a pressurizing passage (337) that communicates the cooling passage with the rotor cavity. The outlet of the nozzle and the connecting opening (337a) of the pressurizing passage are arranged so that distances of the outlet and of the connecting opening from the central axis line in the radial direction of the rotor are the same distance (r).