Acoustics – Sound-modifying means – Muffler – fluid conducting type
Patent
1982-05-03
1984-06-05
Fuller, Benjamin R.
Acoustics
Sound-modifying means
Muffler, fluid conducting type
181222, 415119, B64D 3302
Patent
active
044523351
ABSTRACT:
A sound absorbing structure 38, 52 for a gas turbine engine 10 is disclosed. The sound absorbing structure 52 includes a wall element 54 and a casing 34 of the engine or nacelle 12. The casing is spaced from the wall element leaving a cavity 62 therebetween which is compartmentalized by partitions 64, 66. In one embodiment the partitions are attached to either the wall element or the casing element. In another embodiment the partitions are all attached to the wall element and spaced from the casing element or are all attached to the casing element and spaced from the wall element. In another embodiment the partitions are alternately spaced from the casing element and the wall element such that every other partition 64a is spaced from the wall and the remaining partitions 64b are spaced from the casing.
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Graphic Models for Acoustic Flow Resistance by F. W. Cole, American Society for Metals, Technical Note MDD 503, Apr. 1969.
Gas Turbine Auxiliary Power Unit Noise and Its Attenuation by James J. Dias, Society of Automotive Engineers, 670155, Jan. 9-13, 1967.
Mathews Douglas C.
Peracchio Aldo A.
Fleischhauer Gene D.
Fuller Benjamin R.
United Technologies Corporation
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