Acoustic liner with obliquely angled slots
AssigneeUnited Technologies Corporation
InventorsBruce L. Morin, Anthony R. Bifulco
Life of this patent
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Abstract
An acoustic liner for a gas turbine engine includes an acoustic panel that is curved about a central axis. The acoustic panel includes a support backing, a face sheet, and a cellular structure disposed between the support backing and the face sheet. The face sheet has elongated slots that extend along respective slot centerlines in the plane of the face sheet. The slot centerlines are sloped at oblique angles to the central axis.
Claims26
An acoustic liner for a gas turbine engine, comprising:
- an acoustic panel that is curved about a central axis, the acoustic panel including,
- a support backing,
- a face sheet, and
- a cellular structure disposed between the support backing and the face sheet,
- the face sheet having elongated slots extending along respective slot centerlines in the plane of the face sheet, the slot centerlines being sloped at oblique angles to the central axis.
A gas turbine engine, comprising:
- a fan rotatable about a central engine axis;
- a fan case surrounding the fan, the fan case including an acoustic liner having one or more acoustic panels, the one or more acoustic panels being curved about the central engine axis, wherein each said acoustic panel includes,
- a support backing,
- a face sheet, and
- a cellular structure disposed between the support backing and the face sheet,
- the face sheet having elongated slots extending along respective slot centerlines in the plane of the face sheet, the slot centerlines being sloped at oblique angles to the central engine axis.
A gas turbine engine, comprising:
- a fan operable to rotate in a rotational direction about a central engine axis to provide propulsion;
- a fan case surrounding the fan, the fan case including an acoustic liner downstream of the fan and having one or more acoustic panels, the one or more acoustic panels being curved about the central engine axis, wherein each said acoustic panel includes,
- a support backing,
- a face sheet, and
- a cellular structure disposed between the support backing and the face sheet,
- the face sheet having slots collectively defining a slot texture, wherein the rotational direction of the fan is against the slot texture.
A method of fabricating a face sheet for an acoustic liner, the method comprising:
- forming a face sheet by additive manufacturing, wherein the face sheet is curved about a central axis and that has elongated slots extending along respective slot centerlines in the plane of the face sheet.
Dependencies are inferred from the claim text.