Acoustic damper with barrier member configured to dampen acoustic energy propogating upstream in gas flow
AssigneeGarrett Transportation I Inc.
InventorsBhushan Singh Gautam, Gladys Gaude
Life of this patent
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Abstract
An acoustic damper includes a housing with an inlet aperture and an outlet aperture. The housing is configured to receive a gas flow that enters via the inlet aperture and that exits via the outlet aperture. The acoustic damper also includes a barrier member that is disposed within the housing. The barrier member is configured to be disposed within the gas flow and to dampen acoustic energy that propagates in an upstream direction generally from the outlet aperture toward the inlet aperture. The barrier member includes an outer structure that defines an interior volume of the barrier member. The interior volume is oriented toward the outlet aperture.
Claims20
An acoustic damper comprising:
- a housing that includes an inlet aperture and an outlet aperture, the housing configured to receive a gas flow that enters via the inlet aperture and that exits via the outlet aperture;
- and
- a barrier member that is disposed within the housing, the barrier member configured to be disposed within the gas flow, the barrier member including an outer structure that defines an interior volume of the barrier member, the interior volume oriented toward and open to the outlet aperture, the barrier member configured for dampening acoustic energy that propagates in an upstream direction from the outlet aperture toward the inlet aperture;
- the outer structure containing at least one of:
- a resonator contained within the interior volume of the outer structure;
- and
- an acoustic dampening material contained within the interior volume of the outer structure.
An acoustic damper comprising:
- a housing that includes an inlet aperture and an outlet aperture, the housing configured to receive a gas flow that enters via the inlet aperture and that exits via the outlet aperture;
- a barrier member that is disposed within the housing, the barrier member configured to be disposed within the gas flow, the barrier member including an outer structure that defines an interior volume of the barrier member, the interior volume oriented toward the outlet aperture, the barrier member configured for dampening acoustic energy that propagates in an upstream direction generally from the outlet aperture toward the inlet aperture;
- and
- the barrier member including at least one resonator disposed within the interior volume, the at least one resonator including at least one inner wall that is connected to the outer structure and that defines a chamber within the interior volume;
- wherein the at least one inner wall includes an opening;
- and
- wherein the at least one inner wall, the opening, and the chamber are configured to define a Helmholtz-type resonator.
An acoustic damper comprising:
- a housing that includes an inlet aperture and an outlet aperture, the housing configured to receive a gas flow that enters via the inlet aperture and that exits via the outlet aperture;
- an outer shell that is disposed within the housing and configured to be disposed within the gas flow, the outer shell including an upstream end, a downstream end, and an axis that extends between the upstream end and the downstream end, the outer shell having an outer width that is measured perpendicular to the axis, the outer width gradually increasing from the upstream end to the downstream end along the axis, the outer shell defining an interior volume, the downstream end including an opening into the interior volume;
- at least one resonator that is supported by the outer shell within the interior volume, the at least one resonator including at least one inner wall that is connected to the outer shell and that defines a chamber within the interior volume, the at least one inner wall including an opening;
- and
- the at least one inner wall, the opening, and the chamber being configured to define a Helmholtz-type resonator.
Dependencies are inferred from the claim text.