Noise suppressor for turbo fan jet engines

Details Noise suppressor for turbo fan jet engines Noise suppressor for turbo fan jet engines

1976-02-13

1983-02-08

Garrett, Robert E.

Power plants

Reaction motor

Air passage bypasses combustion chamber

60269, 60271, 23926517, 181213, F02K 144, F02K 146

Patent

active

043721109

ABSTRACT:
A noise suppressor for installation on the discharge or aft end of a turbo fan engine. Within the suppressor are fixed annular airfoils which are positioned to reduce the relative velocity between the high temperature fast moving jet exhaust and the low temperature slow moving air surrounding the same. Within the suppressor nacelle is an exhaust jet nozzle which constrains the shape of the jet exhaust to a substantially uniform elongate shape irrespective of the power setting of the engine. Fixed ring airfoils within the suppressor nacelle therefore have the same salutary effects irrespective of the power setting at which the engine is operated.

REFERENCES:
patent: 2949734 (1960-08-01), Bertin et al.
patent: 3048971 (1962-08-01), Alford
patent: 3463402 (1969-08-01), Langston
patent: 3581841 (1971-06-01), Raynes
patent: 3721389 (1973-03-01), MacKinnon et al.
Cheng, D. Y. et al., "Experimental Study on Optimization Parameters of a Supersonic Jet Ejector", Journal of Aircraft, Sep. 1973, pp. 569-570.
Schaum's Outline Series, Fluid Dynamics, McGraw-Hill, N.Y., 1967, pp. 190-191.

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