Cooled exhaust duct

Fluid sprinkling – spraying – and diffusing – Reaction motor discharge nozzle with jacketed or hollow... – With subsequent mixing in main discharge stream in or...

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Details

60265, 60271, B64D 3304

Patent

active

039702529

ABSTRACT:
An exhaust duct for a turbofan aircraft engine includes a bulbous inner cone which blocks direct sight of the turbine through the duct. Ram air from the fan is caught by scoops and conveyed from a plenum into the double outer wall of the exhaust duct and through hollow struts to the inner cone. Circumferential outlets for film cooling air are distributed axially of the surface of the outer and inner walls. Also, film cooling air is discharged from the struts to cool the rear part of the struts which are visible from without the engine. Direct radiation from within the cone to the outside is blocked by ribs extending into the inside of the inner cone immediately upstream of the cooling air outlets.

REFERENCES:
patent: 2974486 (1961-03-01), Edwards
patent: 3210934 (1965-12-01), Smale
patent: 3262264 (1966-07-01), Gardiner et al.
patent: 3372874 (1968-03-01), Colville et al.
patent: 3374624 (1968-03-01), Coplin

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