Acoustics – Sound-modifying means – Muffler – fluid conducting type
Patent
1986-10-16
1987-09-15
Fuller, Benjamin R.
Acoustics
Sound-modifying means
Muffler, fluid conducting type
181229, 181280, F01N 108
Patent
active
046933395
ABSTRACT:
A muffler for silencing low frequency noise of gas inducting machinery. The muffler includes a buffer reservoir having an inlet and an outlet. The outlet communicates with the gas inlet of the machine. The buffer reservoir has a volume of between twenty and thirty times the displacement of the largest equivalent cylinder of the gas inducting machinery. For a single piston compressor this would be a volume of ten to fifteen times the effective cylinder displacement of the compressor. A convergent/divergent nozzle is connected to the reservoir inlet. The nozzle throat is specially dimensioned relative to the machinery to pass the gas through it to the gas inlet at a throat velocity in the range of Mach 0.7 to 1. A suitable preswirler may be connected to the inlet of the nozzle to reduce the pressure drop across the nozzle.
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Beale Michael C.
Kashy David H.
Fuller Benjamin R.
Newport News Shipbuilding and Dry Dock Company
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