Acoustics – Sound-modifying means – Muffler – fluid conducting type
Reexamination Certificate
2007-12-18
2007-12-18
Martin, Edgardo San (Department: 2837)
Acoustics
Sound-modifying means
Muffler, fluid conducting type
C181S220000, C181S221000, C244S00100R, C244S05300R
Reexamination Certificate
active
10750240
ABSTRACT:
A device for reducing engine exhaust noise in an aircraft engine includes a number of oscillating jets which direct an oscillating flow into the engine exhaust. The oscillating jets are connected via channels to a turbomachinery source of high pressure gas, where the source is located upstream from the engine exhaust portion. The high pressure gas passes through the oscillating jets, which have a nozzle with a triangular shaped orifice and an exhaust pipe, and exits the oscillating jets having a oscillating flow. The oscillating flow mixes with the engine exhaust thus reducing the noise created by the engine exhaust.
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P. Graziosi et al., “Fluidic Chevrons and Configurable Thermal Shield for Jet Noise Reduction”, U.S. Appl. No. 10/610,718, field Jun. 30, 2003.
Clarke Penny A.
Martin Edgardo San
Patnode Patrick K.
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