GAS TURBINE COMBUSTION CHAMBER Russian patent published in 2019 - IPC F23R3/48 

FIELD: machine building.

SUBSTANCE: gas turbine combustion chamber includes multiple combustion chambers, a crossfire tube assembly connecting adjacent combustion chambers from multiple combustion chambers. Each of combustion chambers includes separation wall forming section of combustion chamber, and external peripheral separation wall provided from external periphery of separating wall and forming channel of air passage for combustion between it and separation wall. Crossfire tube assembly includes an internal branch pipe which connects the separation walls of the adjacent combustion chambers and an external branch pipe, which is provided from the outer periphery of the internal connection pipe and connects the external peripheral separation walls of the adjacent combustion chambers. Internal branch pipe is divided in axial direction into the first element of the internal branch pipe and the second element of the internal connection pipe. End section of the second element of the internal branch pipe on the side of the first element of the internal connection pipe has increased section, internal diameter of which exceeds external diameter of the first element of the internal connection pipe. First element of the internal branch pipe and the second element of the internal connection pipe form a connecting section so that part of the first element of the internal branch pipe is located on the side of internal periphery of the enlarged section of the second element of the internal branch pipe with a gap between them. Shape of cross-section in radial direction of any of internal surface of second element of internal branch pipe and outer surface of first element of internal connection pipe on connecting section has multiple sections of small curvature on inner surface of second element of internal connection or on inner pipe first element outer surface. Each of multiple sections of small curvature has curvature less than control curvature, wherein control curvature is curvature at section, where distance from center of cross-section shape is maximum. Curvature is defined by inverse of distance.

EFFECT: invention is aimed at improving the cooling efficiency of the crossfire tube.

12 cl, 8 dwg