LONG-LIVED FLAME-STABILIZING FUEL INJECTOR AND ITS NOZZLE ASSEMBLY (ALTERNATIVES) Russian patent published in 2004 - IPC

FIELD: fuel injectors for gas-turbine units. SUBSTANCE: proposed fuel injector 10 has at least two arc- shaped cylindrical sections 18 forming radially external boundary of mixing chamber 28. Each adjacent pair of cylindrical sections also forms inlet port 36 for admitting primary air flow to mixing chamber for tangential burning. Sections also have axially distributed plurality of primary fuel supply channels for injecting primary fuel to primary air flow. Fuel injector cylindrical insert 46 has nozzle 50 cooled down by impact jets and evaporation designed to feed secondary fuel and secondary air to combustion chamber. Nozzle 50 has baffle plate 74 with plurality of impact-jet channels 76 and end plate 104 with plurality of inlet channels. Impact-jet and inlet channels are not aligned so that secondary air discharged form impact-jet channels strikes end plate and flows through intermediate outlet channels for cooling nozzle by impact air jets and by evaporation. EFFECT: enhanced cooling efficiency and service life of injector. 12 cl