FLAME TUBE OF COMBUSTION CHAMBER OF GAS TURBINE ENGINES DN80 AND DU80 Russian patent published in 2023 - IPC F23R3/06 F23R3/16 

FIELD: gas turbine engines.

SUBSTANCE: combustion chambers of gas turbine engines, in particular combustion chambers. The proposed combustion chamber of the gas turbine engine DN80 and DU80 contains a pipe 1 and a mixer 2, connected to each other, and is equipped with holes 7 for feeding secondary air. The pipe consists of an inlet 6 and hollow cones 3 and is equipped with at least one hole for supplying a flame 4 and holes for film cooling 5, made at an acute angle to the longitudinal axis of the hollow cone. The mixer 2 is made of a monolithic structure in the form of a hollow shell with a variable cross-section with protrusions and depressions, the inlet end of which is designed to be mounted on the pipe 1 and is equipped with an air supply visor 8, a conical protrusion 14 located behind the air supply visor 8, a holder 11 located at the outlet mixer 2, ribs 12 located in the outlet part of the mixer 2, stiffeners 13 located along the perimeter of the holder 11, lock 10. The air supply visor 8 and the conical protrusion 14 are equipped with air supply holes 9, located with the possibility of creating film cooling of the inner wall of the mixer. A reinforcing material in the form of stellite is applied to the retainer 10 by laser cladding.

EFFECT: flame tube of the combustion chamber of the DN80 and DU80 gas turbine engines increases the reliability of the design, increases the thermal cycle life of the flame tube by reducing temperature stresses and improving its protection against burnouts.

2 cl, 15 dwg