Flow mixer and flame stabilizer for a turbofan engine

Details Flow mixer and flame stabilizer for a turbofan engine Flow mixer and flame stabilizer for a turbofan engine

1989-01-12

1990-02-13

Stout, Donald E.

Power plants

Reaction motor

Liquid oxidizer

60262, 60749, F02K 310

Patent

active

048995398

ABSTRACT:
A flow mixer and flame stabilizer structure for an afterburner of a turbofan engine is disclosed having a variable mixer to mix a portion of the cold flow with the hot flow gasses and which also forms a flame stabilizer for a secondary afterburner fuel injection manifold which injects fuel into the cold flow air during afterburner operation. The device forms a flame stabilizer around the secondary, annular fuel injection manifold and has a generally "U" shaped cross-section. One of the legs forming the "U" shape is fixed, while the opposite leg is movable so as to vary the downstream facing opening between the legs. The movable leg also blocks a portion of the cold flow duct to generate localized increases in pressure upstream of the stabilizer. An air scoop located in this upstream portion communicates with the primary afterburner flame stabilizer to direct pressurized air to cool the primary flame stabilizer.

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patent: 4798048 (1989-01-01), Clements et al.
patent: 4817378 (1989-04-01), Giffin et al.

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