COOLED TURBINE OF GAS TURBINE ENGINE Russian patent published in 2023 - IPC F01D5/18 

FIELD: turbine cooling systems of gas turbine engines.

SUBSTANCE: cooled turbine of the gas turbine engine contains nozzle blades, comprising a separating plate dividing the internal volume of the profile part of the blade into front and rear cavities, equipped with deflectors, each of which forms cooling channels along the concave and convex walls of the blade. The blade front cavity deflector is installed in it with the formation of two coolant supply cavities, the upper one of which is made in communication with the film cooling holes of the leading edge of the blade, and the lower coolant supply cavity is in communication with the cooling channels of the walls of the front cavity of the blade and the film cooling holes of the latter. In the deflector of the rear cavity of the blade, there is a rear cavity for supplying coolant and perforations are made connected with the cooling channels of the rear cavity. Each blade contains a connecting channel formed by the deflector of the rear cavity of the blade along the separating plate, provided with a number of bypass holes, in the end part of the deflector of the rear cavity there is a system of outlet slots facing the trailing edge of the blade. The rear coolant supply cavity is in communication with the flow path of the turbine through perforations and a system of outlet slots in the rear cavity deflector, and cooling channels of the trailing edge of the blade, and on the other hand, sequentially through cooling channels of the walls of the rear cavity of the blade connected to each other by means of a connecting channel, a number of bypass holes in the separating plate, the cooling channel of the convex wall of the front cavity of the blade and the film cooling holes of the latter.

EFFECT: reduced coolant consumption due to more complete use of the coolant’s cooling resource and, as a result, increased cooling efficiency of the turbine nozzle blades and the turbine as a whole.

2 cl, 3 dwg