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US 9,752,595 B2Granted
Nacelle core with insert
AssigneeRohr, Inc.
InventorsJose S. Alonso-Miralles, Charles M. Biset, Christian Soria
Life of this patent
Estimating the term…
Abstract
Aspects of the disclosure are directed to a structure comprising: a plurality of cells, a first non-permeable insert in a first cell of the plurality of cells, the first insert configured to constrict, by at least a first threshold amount, a flow of fluid in the first cell such that: acoustic power over a frequency range is attenuated by the structure by at least a second threshold amount, and a resonant frequency associated with the structure is shifted by at least a third threshold amount.
Claims19
A structure comprising:
- a plurality of cells;
- a non-permeable first insert in a first cell of the plurality of cells, the first insert configured to constrict, by at least a first threshold amount, a flow of fluid in the first cell such that:
- acoustic power over a frequency range is attenuated by the structure by at least a second threshold amount, and
- a resonant frequency associated with the structure is shifted by at least a third threshold amount;
- wherein a surface of the first insert forms a hole that extends along an axis through the first insert, and a sectional geometry of the surface as viewed in a plane parallel to the axis is substantially round.
2 more elements
A structure comprising:
- a plurality of cells;
- a non-permeable first insert in a first cell of the plurality of cells, the first insert configured to constrict, by at least a first threshold amount, a flow of fluid in the first cell such that:
- acoustic power over a frequency range is attenuated by the structure b at least a second threshold amount, and
- a resonant frequency associated with the structure is shifted by at least a third threshold amount;
- a non-permeable second insert in a second cell of the plurality of cells;
- and
- a non-permeable third insert in the second cell of the plurality of cells;
- wherein the first insert is substantially located at a center of the first cell, the second insert is substantially located at a top of the second cell, and the third insert is substantially located at a bottom of the second cell.
5 more elements
A structure, comprising:
- a plurality of cells comprising a first cell;
- and
- a non-permeable first insert arranged in the first cell, the first insert configured to constrict, by at least a first threshold amount, a flow of fluid in the first cell such that:
- acoustic power over a frequency range is attenuated by the structure by at least a second threshold amount, and
- a resonant frequency associated with the structure is shifted by at least a third threshold amount;
- wherein an aperture extends along a centerline through the first insert, the aperture is partially formed by an annular edge portion of the first insert, and the annular edge portion comprises a curved bevel.
3 more elements
Dependencies are inferred from the claim text.