US 12,104,793 B2
Fuel injection device for a turbojet engine afterburner
Pierre André Gabriel Malbois, Moissy-Cramayel (FR)
Assigned to SAFRAN AIRCRAFT ENGINES, Paris (FR)
Appl. No. 18/555,930
Filed by SAFRAN AIRCRAFT ENGINES, Paris (FR)
PCT Filed Apr. 15, 2022, PCT No. PCT/FR2022/050716
§ 371(c)(1), (2) Date Oct. 18, 2023,
PCT Pub. No. WO2022/223916, PCT Pub. Date Oct. 27, 2022.
Claims priority of application No. 2103991 (FR), filed on Apr. 19, 2021.
Prior Publication US 2024/0200780 A1, Jun. 20, 2024
Int. Cl. F23R 3/20 (2006.01); F02C 7/18 (2006.01); F02C 7/22 (2006.01); F02K 3/10 (2006.01)
CPC F23R 3/20 (2013.01) [F02C 7/18 (2013.01); F02C 7/22 (2013.01); F02K 3/10 (2013.01)] 12 Claims
OG exemplary drawing
 
1. 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.