SMALL-EMISSION CIRCULAR COMBUSTION CHAMBER FOR GAS TURBINES Russian patent published in 2019 - IPC F23R3/50 F23R3/16 F23R3/28 

FIELD: turbines or turbomachines.

SUBSTANCE: low-emission annular combustion chamber for gas turbines comprises a cylindrical thin-wall outer housing and a cone-shaped thin-wall inner housing in the form of a flue for exhaust of exhaust flue gases at the outlet of the turbine impeller, which are rigidly connected to each other by welding using a thin-sheet shell. Shell is made in the form of a toroid truncated along the main meridian. External, internal housings and shell are made of heat-resistant metal or alloy. At least eight hollow braces of adjustable length are installed radially between inner and outer casings. Each spacer consists of hollow tube with holes. Holes are staggered along the entire length of the surface and over a width equal to the radial sector of spreader from 30 to 60°. Spacers are fixed on one side by a shaped washer with locating pins, and on the other side with adjusting threaded bushing fixed with lock nut. Invention makes it possible to provide cooling of working medium flow, to reduce temperature of nozzle grid, to maintain repairability of labor-consuming and expensive CS.

EFFECT: invention is aimed at improvement of efficiency of combustion chamber, ensuring complete combustion of fuel with simultaneous reduction of temperature of combustion products and reduced emission of NO_x, CO, CO_x, elimination of combustion chamber warping and increased durability.

1 cl, 4 dwg