US 12,339,002 B2
Propulsion system for jet noise reduction
Nikolai N. Pastouchenko, Latham, NY (US); Umesh Paliath, Clifton Park, NY (US); Changjin Yoon, Schenectady, NY (US); Jason A. Lee, Loveland, OH (US); and David Andrew Perveiler, West Chester, OH (US)
Assigned to General Electric Company, Evendale, OH (US)
Filed by General Electric Company, Schenectady, NY (US)
Filed on Apr. 29, 2022, as Appl. No. 17/732,888.
Prior Publication US 2023/0349555 A1, Nov. 2, 2023
Int. Cl. F23R 3/20 (2006.01); F02K 3/10 (2006.01)
CPC F23R 3/20 (2013.01) [F02K 3/10 (2013.01); F05D 2220/323 (2013.01); F05D 2240/35 (2013.01); F05D 2260/96 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A propulsion system comprising:
a turbomachine; and
an afterburner assembly disposed downstream of the turbomachine, the afterburner assembly comprising:
an exhaust section; and
a fuel injector assembly positioned within the exhaust section, the fuel injector assembly comprising a plurality of fuel injection members and a flame stability device, the plurality of fuel injection members each spaced circumferentially apart, each fuel injection member extending radially inward, the plurality of fuel injection members each operable for injecting fuel in the exhaust section, wherein during operation in a full thrust condition of the propulsion system and the plurality of fuel injection members a hot zone and a cold zone are defined by an injection rate of the fuel into the exhaust section via the plurality of fuel injection members, wherein the cold zone is positioned radially outward of the hot zone, wherein during operation of the propulsion system and the plurality of fuel injection members a noise insulation barrier for the hot zone is provided by the cold zone, wherein during operation in the full thrust condition, the cold zone radially shields noise generated by the hot zone thereby reducing external noise produced by the afterburner assembly, wherein the fuel injector assembly is operable to modify a fuel injection rate of the plurality of fuel injection members, wherein the flame stability device comprises a first flame stability device positioned downstream of the plurality of fuel injection members and a second flame stability device positioned downstream of the plurality of fuel injection members, and wherein the first flame stability device has a first configuration and the second flame stability device has a second configuration different than the first configuration.