FIELD: device for fuel combustion.
SUBSTANCE: fuel injection device for annular combustion chamber of turbomachine comprises a control circuit, constantly feeding injector, which outputs into a first Venturi tube, and a multipoint circuit. Multipoint circuit intermittently supplies injection holes made in frontal surface of inlet annular chamber of a second Venturi tube coaxial with first Venturi tube. Circular nozzle apparatus surrounds second venturi tube, is installed in annular chamber and has holes for passage of fuel, exiting into said injection holes. Each hole for passage of fuel, made in annular nozzle apparatus, comprises a zone of reduced section, extending at least upstream or downstream of part of holes with increasing section.
EFFECT: invention reduces formation of scale on level of holes of annular nozzle apparatus.
11 cl, 6 dwg
