FUEL INJECTOR WITH RADIAL AND AXIAL SWIRLERS FOR GAS TURBINE AND GAS TURBINE Russian patent published in 2020 - IPC F23R3/28 

FIELD: turbines or turbomachines.

SUBSTANCE: embodiments of the invention relate to fuel injectors of gas turbines, having radial and axial swirlers, and to gas turbines in which said nozzles are used. According to first versions, fuel atomizer comprises radial swirler and axial swirler, wherein the radial swirler is configured to swirl the first flow of the first fuel and oxidizer mixture, and the axial swirler is configured to swirl the second flow of the second fuel and oxidant mixture. First flow can be supplied along the central channel, and the second flow can be supplied along the annular channel surrounding the central channel. With the radial swirler of the injector, the first recirculation zone is interconnected, and the second recirculation zone is interconnected with the axial swirler of the injector, at least partially located downstream relative to first recirculation zone. Nozzle body has central channel, which extends in axial direction, starts from chamber, continues with convergent section and ends with divergent section, wherein first feeding channels of radial swirler in radial direction are tangential and terminate in said chamber. Second versions of the invention disclosed herein relate to gas turbines. According to the second versions, the gas turbine comprises at least one above-described fuel injector having a radial swirler and an axial swirler.

EFFECT: this invention is aimed at solution of problem, which consists in provision of fuel atomiser operation reliability and solved by ensuring flame stability and reduction of NOx emissions.

12 cl, 5 dwg