Noise suppressing nozzle

Details Noise suppressing nozzle Noise suppressing nozzle

1980-12-15

1982-06-22

Hix, L. T.

Acoustics

Sound-modifying means

Muffler, fluid conducting type

181220, F01N 114, F02K 100

Patent

active

043358012

ABSTRACT:
Wall deflections of a multi-lobe type noise suppressing nozzle are minimized without the use of external struts and by the use of only a single internal strut per lobe. The lobes have either a substantially elliptical or substantially circular shape in cross section and they merge into valley regions of substantially circular curvature in cross section. The internal struts and thickened sidewall portions of the lobes define a structural ring providing hoop and bending strength at the center of the nozzle. The thickened sidewall sections of the lobes are welded to shaped sheet metal crown and forward valley sections to form the nozzle. Wall portions of the nozzle are thinned by the chemical milling for the purpose of weight reduction.

REFERENCES:
patent: 2565308 (1951-08-01), Hottel et al.
patent: 3053340 (1962-09-01), Kutney
patent: 3084505 (1963-04-01), Cherchi
patent: 3092205 (1963-06-01), Brown et al.
patent: 3508403 (1970-04-01), Neitzel
patent: 3568794 (1971-03-01), Hilbig
patent: 3647021 (1972-03-01), Millman
patent: 4117671 (1978-10-01), Neal

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