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US 9,429,042 B2Granted
Acoustic damping device for chambers with grazing flow
AssigneeGeneral Electric Technology GmbH
InventorsFranklin Marie Genin, Devis Tonon, Mirko Ruben Bothien, Douglas Anthony Pennell
Life of this patent
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Abstract
An acoustic damping device is provided which includes at least one opening for a sealing gas to deflect a grazing gas flow away from the mouth of an acoustic damper.
Claims17
An acoustic damper comprising:
- a neck and a damping volume, wherein the neck comprises a mouth being in fluid connection with a chamber, wherein adjacent to the mouth of the neck at least one opening for a sealing gas is located;
- the acoustic damper configured such that the at least one opening for the sealing gas is directed into the chamber to form a windshield in the chamber such that a grazing flow of gas passing through the chamber is deflected away from the mouth so that a bias flow of gas passing through the mouth is feedable into the chamber via the mouth independent of the grazing flow;
- and
- wherein the at least one opening for sealing gas is configured so that each of the at least one opening emits sealing gas into the chamber in a direction that is parallel to a direction at which the bias flow of gas is emitted from the mouth into the chamber and is perpendicular to the grazing flow;
- wherein each of the at least one opening is structured such that the sealing gas is emitted at a first velocity that is greater than a velocity of the bias flow and is also greater than a velocity of the grazing flow.
2 more elements
A gas turbine comprising:
- a combustion chamber defined by at least one wall having an inner surface;
- an acoustic damper comprising a neck and a damping volume, the neck having a mouth in the inner surface of the wall in fluid communication with the combustion chamber;
- the combustion chamber configured such that a grazing flow of gas is flowing inside the combustion chamber along a portion of the inner surface;
- the acoustic damper defining at least one opening adjacent the mouth configured to emit a sealing gas into the chamber upstream of the mouth in a direction of flow that is transverse to a direct on of flow of the grazing flow to deflect the grazing flow away from the mouth;
- and
- wherein the at least one opening is configured such that the sealing gas has a velocity that is greater than a velocity of the grazing flow and is greater than a velocity of a bias flow of gas that is passed through the mouth and into the combustion chamber via the acoustic damper.
3 more elements
Dependencies are inferred from the claim text.