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

1979-06-28

1981-11-03

Hartary, Joseph W.

Acoustics

Sound-modifying means

Muffler, fluid conducting type

181220, F02K 146

Patent

active

042980895

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 tail cone is disposed in the primary exhaust downstream of the vortex generators.

REFERENCES:
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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), Versow 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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