Acoustics – Sound-modifying means – Muffler – fluid conducting type
Patent
1979-10-22
1981-08-18
Hix, L. T.
Acoustics
Sound-modifying means
Muffler, fluid conducting type
23926519, F02K 100
Patent
active
042841704
ABSTRACT:
Noise generated in a coannular airstream where there are concentric spaced pipes discharging the flow and the outer pipe extends beyond the inner pipe as in the tail pipe configuration of a fan-jet engine is dissipated by discreetly locating tabs extending internally at the discharge end of the inner pipe. This serves to destroy the coherence of the unsteady pressure field occasioned when the coannular flow streams comingle.
REFERENCES:
patent: 3055174 (1962-09-01), Grotz et al.
patent: 3927522 (1975-12-01), Bryce et al.
patent: 4175640 (1979-11-01), Birch et al.
Larson Richard S.
Packman Allan B.
Friedland Norman
Hix L. T,.
Tarcza Thomas H.
United Technologies Corporation
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