Integral infrared radiation suppressor for a turbofan engine

Details Integral infrared radiation suppressor for a turbofan engine Integral infrared radiation suppressor for a turbofan engine

1979-08-20

1981-06-09

Hart, Douglas

Power plants

Reaction motor

Interrelated reaction motors

60262, 60266, 60722, 415116, F02K 304

Patent

active

042716667

ABSTRACT:
Apparatus is disclosed for minimizing the infrared radiation emitted at the aft end of a bypass fan type turbine engine. Minimization is accomplished by ducting cool air from the secondary bypass airstream through an annulus to form a sheath of cooler air around the gas stream as it is discharged from the engine tailpipe. The sheath of air educted along the inside surface of the engine tailpipe minimizes infrared radiation in two ways. First it reduces the operating temperature of the tailpipe thus keeping radiation therefrom to a low level. Second, the cool outside air becomes entrained in the hot gas stream discharged from the turbine. This results in a reduction of the effective temperature of the gas plume and suppresses infrared radiation therefrom.

REFERENCES:
patent: 2445661 (1948-07-01), Constant
patent: 2639579 (1953-05-01), Willgoos
patent: 2826895 (1958-03-01), English
patent: 3742705 (1973-07-01), Sifford
patent: 3970252 (1976-07-01), Smale
patent: 4136518 (1979-01-01), Hurley
patent: 4163366 (1979-08-01), Kent

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