Nozzle system

Details Nozzle system Nozzle system

1983-08-18

1987-02-24

Barefoot, Galen

Aeronautics and astronautics

Aircraft, heavier-than-air

Airplane and fluid sustained

244207, 244 53R, 23926511, 239601, 239592, 60269, B64C 2104, B64D 3304

Patent

active

046451404

ABSTRACT:
A nozzle system for providing improved thrust augmentation for an aircraft lift and/or propulsion system is provided. The unique nozzle structure is designed such that counter-rotating vortices emanate from the nozzle tips. When this unique nozzle configuration is combined with simple slot nozzles in a specific manner a vortex rich flow will result. When a diffuser is placed around this unique combination such that jet pumping is obtained, significant improvement in thrust augmentation is realized from the vortex rich flow mixing with the coflowing secondary air stream.

REFERENCES:
patent: D190373 (1961-05-01), Huthsing
patent: 1493280 (1924-05-01), Rees
patent: 2973922 (1961-03-01), Davidson
patent: 3027713 (1962-04-01), Tyler et al.
patent: 3288377 (1966-11-01), Van De Roer
patent: 3428257 (1969-02-01), Kentfield et al.
patent: 3730292 (1973-05-01), MacDonald
patent: 4311291 (1982-01-01), Gilbertson et al.
Butz, Jr. "NACA Studies Ways to Soften Jet Noise", Aviation Week, 11-4-57, pp. 73, 75 and 77.

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