Underwater vehicle muffler

Details Underwater vehicle muffler Underwater vehicle muffler

1992-07-10

1993-10-19

Eldred, J. Woodrow

Ships

Torpedoes

181235, 181267, 440 89, F42B 1900

Patent

active

052536033

ABSTRACT:
A muffler for use with an underwater vehicle. The muffler is mechanically attached to an exhaust tube or aft end of the underwater vehicle and has an hydrodynamic shape and perforated exterior that results in the production of less noise by the vehicle. Large bubbles have been determined to be offensive due to lower frequency collapsing noise which produces a louder vehicle exhaust. The present invention is perforated with holes to break up the flow of exhaust gas from the vehicle into small diameter bubbles that are emitted into the water. The present invention has a contoured outer wall that matches the contour of the underwater vehicle to provide for the hydrodynamic flow of water around the vehicle as it is propelled through the water. The present invention eliminates hydrodynamic voids at the aft end of the vehicle that would normally allow smaller bubbles to coalesce into large bubbles.

REFERENCES:
patent: 675830 (1901-06-01), Gray
patent: 2807329 (1957-09-01), Caldwell
patent: 3561561 (1971-02-01), Trainor
patent: 4213414 (1980-07-01), Sato et al.

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