Vortex generators for internal mixing in a turbofan engine

Details Vortex generators for internal mixing in a turbofan engine Vortex generators for internal mixing in a turbofan engine

1976-12-23

1979-11-27

Tomsky, Stephen J.

Acoustics

Sound-modifying means

Muffler, fluid conducting type

60262, 60317, 181220, 23926517, 415119, E04B 199, G10K 1104

Patent

active

041756401

ABSTRACT:
Method and apparatus for reducing jet noise in a turbofan engine by causing internal mixing of fan and primary air to reduce the maximum velocity of gases at the nozzle exit plane by creating a particular type of vortex flow at a distance of at least one nozzle diameter forward of the nozzle exit plane. In one preferred embodiment for a JT8D engine an array of eight roll-top vortex generators are provided on each side of the splitter wall between fan and primary flows, and a portion of the fan air may be introduced into the central portion or core of the hot primary air.

REFERENCES:
patent: 2934889 (1960-05-01), Poulos
patent: 2944623 (1960-07-01), Bodine, Jr.
patent: 3161257 (1964-12-01), Young
patent: 3574477 (1971-04-01), Dolf et al.
patent: 3613827 (1971-10-01), Labussiere
patent: 3647020 (1972-03-01), MacDonald
patent: 3693880 (1972-09-01), Versaw et al.
patent: 3830431 (1974-08-01), Schwartz
patent: 3910375 (1975-10-01), Hache et al.
patent: 4010608 (1977-03-01), Simmons

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