Retractable engine noise suppression system for over-the-wing je

Details Retractable engine noise suppression system for over-the-wing je Retractable engine noise suppression system for over-the-wing je

1976-05-06

1977-07-19

Blix, Trygve M.

Aeronautics and astronautics

Miscellaneous

181 33HB, 23926513, B64D 3306

Patent

active

040364526

ABSTRACT:
Retractable multiple aperture arrays, mounted behind jet engines that produce jet exhausts that pass chordwise over the wings of an aircraft, are disclosed. In their operative positions, a multiple aperture array lies in the exhaust path of each engine, immediately rearwardly of the engine nacelle. In this position, in a conventional manner, the arrays split the exhausts into separate streams, which entrain ambient air. The entrained ambient air mixes with the separated streams in the region where the streams recombine to suppress engine exhaust noise and move the noise source centers of the engine exhausts to positions above the wings. As a result, the wings act to shield noise from the line-of-sight community located generally beneath the wings. When not in use, the mutliple aperture arrays are each stowed in a compartment formed in the upper surface of the wing, beneath and immediately rearwardly of the engine with which the array is associated. Doors that close the entrance to these compartments may remain open when the multiple aperture arrays are in their operative positions to provide lateral noise shielding.

REFERENCES:
patent: 2991961 (1961-07-01), Rogallo et al.
patent: 3018983 (1962-01-01), Davidson
patent: 3067968 (1962-12-01), Hempenstall
patent: 3088694 (1963-05-01), Stirgwolt et al.
patent: 3612212 (1971-10-01), MacDonald
patent: 3625009 (1971-12-01), Schairer et al.
patent: 3677501 (1972-07-01), Denning
patent: 3710890 (1973-01-01), True et al.

Affiliated with

Also associated with

Rating

Retractable engine noise suppression system for over-the-wing je does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Retractable engine noise suppression system for over-the-wing je, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Retractable engine noise suppression system for over-the-wing je will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2289772