US 12,759,720 B2Granted

Acoustic panel for an aircraft propulsion system

AssigneeRohr, Inc.

InventorAaron T. Noel

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Abstract

An acoustic panel assembly includes an acoustic panel including an acoustic core arranged along a transverse direction and a longitudinal direction. The acoustic core extends between and to an inner core side and an outer core side. The acoustic core includes a plurality of cell rows distributed transversely. Each cell row of the plurality of cell rows includes a plurality of cells distributed longitudinally along the respective cell row of the plurality of cell rows. Each cell of the plurality of cells includes a first transverse panel, a second transverse panel, a first longitudinal panel, a second longitudinal panel, and an oblique panel extending between the inner core side and the outer core side. Each cell row of the plurality of cell rows includes a primary folded sheet and a secondary folded sheet. Each of the primary folded sheet and the secondary folded sheet forms the first transverse panel, the first longitudinal panel, and the second longitudinal panel for each cell of the plurality of cells.

Claims17

Dependent claims

An acoustic panel assembly for an aircraft propulsion system, the acoustic panel assembly comprising:

an acoustic panel including an acoustic core arranged along a transverse direction and a longitudinal direction, the acoustic core extends between and to an inner core side and an outer core side, the acoustic core includes a plurality of cell rows distributed transversely along the acoustic core, each cell row of the plurality of cell rows includes a plurality of cells distributed longitudinally along the respective cell row of the plurality of cell rows,
each cell of the plurality of cells includes a first transverse panel, a second transverse panel, a first longitudinal panel, a second longitudinal panel, and an oblique panel extending between the inner core side and the outer core side, the first longitudinal panel and the second longitudinal panel extend between and to the first transverse panel and the second transverse panel, and the oblique panel extends between and to the first transverse panel at the outer core side and the second transverse panel at the inner core side;
and
each cell row of the plurality of cell rows includes a primary folded sheet and a secondary folded sheet, and each of the primary folded sheet and the secondary folded sheet forms the first transverse panel, the first longitudinal panel, and the second longitudinal panel for each cell of the plurality of cells;
wherein the primary folded sheet includes, for each cell of the plurality of cells, a primary transverse panel portion, a primary first longitudinal panel portion, a primary secondary longitudinal panel portion, and the oblique panel;
and
wherein the primary folded sheet further includes, for each cell of the plurality of cells, a first attachment tab at the primary first longitudinal panel portion and a second attachment tab at the primary second longitudinal panel portion, and each of the first attachment tab and the second attachment tab is attached to an adjacent cell row of the plurality of cell rows.

4 more elements

A method for forming an acoustic panel assembly for an aircraft propulsion system, the method comprising:

forming a plurality of cell rows of an acoustic core by, for each cell row of the plurality of cell rows, folding and assembling a primary sheet and a secondary sheet to form each cell row with a plurality of cells, and each cell of the plurality of cells includes a first transverse panel, a first longitudinal panel, a second longitudinal panel, a first attachment tab, and an oblique panel extending between an inner core side of the acoustic core and an outer core side of the acoustic core, each of the primary sheet and the secondary sheet forms the first transverse panel, the first longitudinal panel, and the second longitudinal panel, the first longitudinal panel and the second longitudinal panel extend transversely from the first transverse panel, and the oblique panel extends transversely between and to the first transverse panel at the outer core side and the inner core side;
and
attaching the first attachment tab of each cell row of the plurality of cell rows to a respective first attachment tab of at least one other cell row of the plurality of cell rows to form the acoustic core.

An acoustic panel assembly for an aircraft propulsion system, the acoustic panel assembly comprising:

an inner skin extending circumferentially about an axial centerline, the inner skin extends between and to an inner skin side and an outer skin side, and the inner skin includes a perforated skin portion;
and
an acoustic panel including an acoustic core disposed on the outer skin side at the perforated skin portion, the acoustic core is arranged along a transverse direction and a longitudinal direction, the acoustic core includes a plurality of cell rows distributed transversely along the acoustic core, each cell row of the plurality of cell rows includes a plurality of cells distributed longitudinally along the respective cell row of the plurality of cell rows,
each cell of the plurality of cells includes a first transverse panel, a second transverse panel, a first longitudinal panel, and a second longitudinal panel, the first longitudinal panel and the second longitudinal panel extend between and to the first transverse panel and the second transverse panel;
and
at least one cell row of the plurality of cell rows includes a primary folded sheet and a secondary folded sheet, the primary folded sheet includes, for each cell of the plurality of cells, a primary transverse panel portion, a primary first longitudinal panel portion, and a primary secondary longitudinal panel portion, and the secondary folded sheet includes, for each cell of the plurality of cells, a secondary transverse panel portion disposed on the primary transverse panel portion to form the first transverse panel, a secondary first longitudinal panel portion disposed on the primary first longitudinal panel portion to form the first longitudinal panel, and a secondary second longitudinal panel portion disposed on the primary second longitudinal panel portion to form the second longitudinal panel;
wherein the primary folded sheet further includes, for each cell of the plurality of cells, a first attachment tab at the primary first longitudinal panel portion and a second attachment tab at the primary second longitudinal panel portion, and each of the first attachment tab and the second attachment tab is attached to an adjacent cell row of the plurality of cell rows.

4 more elements

Dependencies are inferred from the claim text.