METHOD FOR SPRAYING OF LIQUID HYDROCARBON FUEL AND SPRAYING NOZZLE Russian patent published in 2009 - IPC F02C7/22 

FIELD: engines and pumps.

SUBSTANCE: method for spraying of liquid hydrocarbon fuel in air flow compressed in compressor of gas turbine engine or gas turbine plant and passing through nozzle, to the inlet of which fuel flow is supplied with low head, characterised by the fact that incoming fuel flow is separated in trickles. Trickles are evenly located circumferentially and additional tangential motion direction is imparted to them. Trickles are poured into fuel film on short hard surface that covers all trickles from external side, and free rotary bell-shaped fuel film that does not contact with hard surface is formed. Axial air flow is injected into cavity of bell-shaped fuel film, and this flow balances air pressure on both sides of film and makes it possible for rotary bell-shaped fuel film to expand without damage as it moves to nozzle outlet. Fuel film thinned as a result of expansion is introduced into peripheral high-speed air flow previously swirled in direction of film rotation, which sprays film to arrange finely dispersed spray cone with fuel drops evenly distributed circumferentially. Nozzle for fuel spraying comprises multiple-flighted fuel screw installed in fuel channel and separating supplied fuel flow into separate trickles evenly located circumferentially and imparting additional tangential speed to them. Nozzle also comprises channels of axial air flow and channel of peripheral high-speed air flow. Plane of axial air flow channel outlet end together with screw are displaced inside fuel needle to arrange short hard surface covering fuel trickles, which assists in confluence of fuel trickles into rotary fuel film, which takes bell shape as a result of rotation after drippage from hard surface.

EFFECT: provision of finely dispersed stable air fuel cone with fuel drops evenly and circumferentially distributed.

10 cl, 6 dwg