Noise suppressor for turbine type power plant

Details Noise suppressor for turbine type power plant Noise suppressor for turbine type power plant

1975-05-19

1976-11-09

Gonzales, John

Acoustics

Auditorium

23926513, B64D 3306

Patent

active

039905306

ABSTRACT:
A combined ejector and retractable suppressor to suppress jet noise occasioned by the hot gases discharging from the tail pipe of a gas turbine engine has a generally conical shaped duct member defining a primary nozzle coaxially mounted within the ejector and radially spaced therefrom for defining therewith a secondary flow passage, which member carries a plurality of circumferentially spaced flaps overlying complementary apertures for admitting hot gases passing from the tail pipe of the engine into the secondary flow passage to mix with the secondary air before discharging through the exit nozzle. These apertures are judiciously located relative to the ejector so that the hot gases in the duct are admitted at the entrance of the ejector and the flaps are dimensioned to achieve optimum air mixture. A fairing on the flaps extending in the inner diameter of the duct member serves to reduce thrust losses.

REFERENCES:
patent: 3262264 (1966-07-01), Gardiner et al.
patent: 3333772 (1967-08-01), Bruner
patent: 3467312 (1969-09-01), Mehr
patent: 3524588 (1970-08-01), Duval
patent: 3613996 (1971-10-01), Tanner
patent: 3696617 (1972-10-01), Ellis

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