METHOD OF COOLING TURBINE STAGE AND GAS TURBINE COMPRISING COOLED TURBINE STAGE

摘要

FIELD: engines and pumps.;SUBSTANCE: gas turbine includes a cooled turbine stage (8) which is operated with cooling by cooling medium guide vane (11) and means (19-24) for supplying cooling medium into cooling medium flow guide vane (11). Blade in its rear edge (16) at its pressure side (18) has at least one opening (25) for cooling medium outlet through which a cooling medium can flow from inside of guide vane (11) to main flow. Device (19-24) for feeding a cooling medium (20) control mass flow to mass flow control through said at least one opening (25) for exit of cooling medium, through which the mass flow through said at least one opening (25) to exit cooling medium in the partial load operation of the gas turbine (1) can be increased compared with mode of full load of gas turbine (1).;EFFECT: improved action of guide vanes at partial loads.;15 cl, 1 dwg