F - Mech Eng,Light,Heat,Weapons – 02 – K
Patent
F - Mech Eng,Light,Heat,Weapons
02
K
60/110
F02K 3/10 (2006.01) F23R 3/20 (2006.01)
Patent
CA 1050286
AUGMENTOR FLAMEHOLDING APPARATUS Abstract of the Disclosure A flameholder for the afterburner of an aircraft gas turbine engine is provided which comprises a pair of con- centric rings forming an annular flow passage therebetween which has a continuous annular inlet for receiving the gas flow from the turbine exhaust. A plurality of discrete pilot fuel jets eject pilot fuel into the passage. A plurality of flow vanes are positioned within and around the circumference of the annular flow passage in order to impart a circumferential swirl to the fuel-air mixture and thereby improve the mixing and vaporizing thereof. An igniter of the spark type is positioned downstream of the swirl vanes. The outer annular wall of the flow passage extends downstream of and diverges conically outward from the inner wall of the flow passage. An annular V-shaped gutter is secured to the downstream end of the inner wall of the annular flow passage in order to provide a stable flameholding surface. The pre-mixed, vaporized fuel recir- culates into the V-gutter to provide combustion stability. A plurality of radially extending V-shaped vanes may also be secured to the downstream end of the inner annular wall of the annular flow passage in order to further spread the flame.
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