Variable area nozzle for a gas turbine engine

Details Variable area nozzle for a gas turbine engine Variable area nozzle for a gas turbine engine

1979-06-11

1982-01-19

Reeves, Robert B.

Fluid sprinkling, spraying, and diffusing

Reaction motor discharge nozzle

With means controlling amount, shape or direction of...

B64C 1502

Patent

active

043112765

ABSTRACT:
In a jet pipe and variable area final nozzle assembly, the jet pipe 12 is necked at a region upstream of the final nozzle to reduce the diameter of the remainder of the jet pipe downstream of the neck to a diameter more nearly equal to but not less than the maximum throat area of the nozzle. The nozzle flaps are pivoted to the end of the jet pipe, although they could alternatively be translatable, and have an upstream portion 20 which overlies the jet pipe. An actuating mechanism preferably in the form of a unison ring 30 operated by jacks is mounted around the reduced diameter portion of the jet pipe and operates on the upstream portions of the nozzle flaps via a roller and cam arrangement 26, 24 to vary the area of the nozzle. An outer fairing 14 which now need be of no greater diameter than the maximum diameter of the jet pipe surrounds the jet pipe and the actuating mechanism (see FIG. 1).

REFERENCES:
patent: 2928234 (1960-03-01), Brown
patent: 3837580 (1974-09-01), Camboulives et al.
patent: 4099199 (1977-09-01), Nightingale

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