FRONT DEVICE OF FLAME TUBE OF DUAL-FUEL COMBUSTION CHAMBER Russian patent published in 2023 - IPC F23R3/36 

FIELD: energy.

SUBSTANCE: invention relates to the devices for ensuring combustion of the fuel-air mixture in the combustion chambers of gas turbine engines operating on gaseous and liquid fuels. The front device of the flame tube of a dual-fuel combustion chamber contains an annular head with external and internal fuel manifolds, with gas supply fittings evenly spaced around the circumference of the outer fuel manifold into the internal cavity of the outer manifold and air shaped windows made on the annular head between the manifolds, concentrically and evenly spaced around the circumference air supply with central holes and racks for attaching the nozzles to the annular head. The racks have through channels for supplying fuel to the injectors. In the middle of the annular head, on the outer side, there is a streamlined hollow annular manifold with channels for supplying fuel to the injectors; the hollow annular manifold is located in a diffuser and has a fuel supply fitting. The injectors contain two cavities, one of which is connected to the outer and internal fuel manifolds, filled with gaseous fuel - gas, and the other - with channels for supplying fuel from a hollow annular manifold, filled with liquid fuel. The injectors are equipped with a liquid atomizer and a gaseous fuel atomizer; the injectors of the outer and inner rows in the ring head are spaced relative to each other at a distance of 1.4 injector diameters.

EFFECT: invention makes it possible to switch from one type of fuel to another, provides equally distributed air flow to the upper row of injectors and to the lower row of injectors, and the absence of coking of liquid fuel.

1 cl, 2 dwg