Fuel injection device for a turbojet engine afterburner
AssigneeSafran Aircraft Engines
InventorPierre André Gabriel Malbois
Life of this patent
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Abstract
A flame-holder device for a turbojet afterburner comprises an annular row of flame-holder arms, each having an inner branch having a free end and another end, and two outer branches which extend from the other end (52) and diverge from one another in a direction extending from the free end to the other end, such that the inner branch transitions radially outward into the two outer branches which diverge radially outward from one another in two opposing circumferential directions, thereby forming mutually approaching areas between consecutive flame-holder arms for enabling the flame to spread from arm to arm.
Claims12
A fuel injection device for a turbojet engine afterburner, comprising:
- a base intended to connect the fuel injection device to an afterburner channel casing,
- a fuel tube having a tubular wall provided with fuel ejection ports and defining an outer surface of the fuel tube,
- an air tube having a tubular wall provided with cooling air passage ports, and
- a casing defining a volume in which the air tube extends with some clearance and outside of which the fuel tube extends,
- wherein the casing includes a casing fuel tube side portion extending between the air tube and the fuel tube and having a concave outer surface opposite the fuel tube, an opposite side portion having a convex outer surface, and two lateral portions each connecting the casing fuel tube side portion to the opposite side portion and having respective outer surfaces in aerodynamic continuity with the outer surface of the fuel tube;
- wherein the fuel tube extends opposite and at a distance from the casing fuel tube side portion of the casing,
- wherein the casing defines cooling air outlets formed in the lateral portions of the casing and which connect the volume defined by the casing to the outside of the device,
- and wherein the fuel tube, the air tube and the casing are rigidly connected to the base independently of each other and extend freely relative to each other from the base.
Dependencies are inferred from the claim text.