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US 9,909,471 B2Granted
Noise attenuating acoustic panel
AssigneeUnited Technologies Corporation
InventorStephen H. Mattia
Life of this patent
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Abstract
An acoustic panel is provided that includes a first layer, a perforated second layer, a core and a noise attenuating feature. The core forms a chamber between the first and the second layers. The noise attenuating feature projects partially into the chamber. The noise attenuating feature is formed integral with the first layer, the second layer and/or the core.
Claims19
An acoustic panel, comprising:
- a first layer;
- a perforated second layer;
- a core forming a chamber between the first and the second layers;
- a plurality of noise attenuating features projecting partially into the chamber, each of the noise attenuating features formed integral with at least one of the first layer, the second layer or the core;
- and
- a protrusion comprising an internal canted surface that projects, partially into a cavity within the core, away from the first layer to a peak of the protrusion, the peak disposed a non-zero distance from the second layer;
- wherein each of a first set of the noise attenuating features projects partially into the chamber from the first layer to a respective distal end, and a gap is between the distal end and the second layer;
- wherein one of the noise attenuating features comprises a tube fluidly coupled with a perforation in the second layer, and the internal canted surface is positioned opposite an orifice of and disposed outside of the tube.
5 more elements
An apparatus for a turbine engine, the apparatus comprising:
- an acoustic panel including a first layer, a perforated second layer and a muffler between the first layer and the second layer;
- wherein the muffler is configured internally within the panel and to attenuate noise generated during operation of the turbine engine;
- wherein the muffler comprises one or more tubes, each of the one or more tubes is fluidly coupled with a respective perforation in the second layer;
- wherein the acoustic panel includes a protrusion comprising one or more internal canted surfaces aligned with, positioned opposite an orifice of and disposed outside of each of the one or more tubes;
- wherein a first of the one or more internal canted surfaces projects, partially into a cavity within the acoustic panel, away from the first layer to a peak of the protrusion;
- and
- wherein the peak is disposed a non-zero distance from the second layer.
4 more elements
A manufacturing method, comprising:
- forming an acoustic panel, the acoustic panel comprising a plurality of noise attenuating features projecting partially into an internal chamber of the acoustic panel;
- wherein at least one of the noise attenuating features is formed using an additive manufacturing system;
- and
- wherein each of a first set of the noise attenuating features projects partially into the chamber from a first layer to a respective distal end, a second set of the noise attenuating features project partially into the chamber from a second layer, and a gap is between the distal end and the second layer;
- wherein the acoustic panel further comprises a protrusion with an internal canted surface that projects, partially into a cavity within the acoustic panel, away from the first layer to a peak of the protrusion, and the peak is disposed a non-zero distance from the second layer;
- and
- wherein one of the second set of the noise attenuating features comprises a tube fluidly coupled with a perforation in the second layer, and the internal canted surface is positioned opposite an orifice of and disposed outside of the tube.
4 more elements
Dependencies are inferred from the claim text.