UNIT OF NOZZLE BLADES WITH CHANNEL FOR AIR TRANSIT FROM AIR-TO-AIR HEAT EXCHANGER Russian patent published in 2024 - IPC F01D9/04 F01D5/18 F02C7/18 

FIELD: aircraft engine building.

SUBSTANCE: invention is intended for nozzle assemblies of a turbine of an aircraft gas turbine engine. Unit of nozzle blades with channel for air transit from air-to-air heat exchanger includes three three-cavity nozzle blades and two flanges with deflectors and screens. In the front partition there are openings along the back and trough for the secondary air passage of the main combustion chamber from the blade cavity of the leading edge to the transit cavity in order to cool sections of the back and trough of the airfoil, which form a transit cavity—an air transfer channel from an air-to-air heat exchanger (AAHE) to a working blade of the turbine. Air from the air-to-air heat exchanger is transmitted through a thin-walled deflector installed into the transit cavity, and cooling air flows in gap between deflector and wall and is ejected into flow part through row of perforation holes in wall of nozzle blade.

EFFECT: reduced air consumption through air-to-air heat exchanger due to its use only for cooling of working blade, higher efficiency due to nozzle blades cooling by main combustion chamber secondary air and working blade cooling by air from air-to-air heat exchanger.

1 cl, 3 dwg