Acoustic panel core cell with funnel shaped septum
An acoustic panel is provided that includes a perforated first skin, a second skin and a core. The core is connected to the perforated first skin and the second skin. The core includes a plurality of chambers and a plurality of septums respectively arranged with the chambers. The chambers include a first chamber that extends vertically between the perforated first skin and the second skin. The septums include a first septum that extends laterally across the first chamber. The first septum includes a first septum orifice. The first septum tapers laterally inward towards the first septum orifice as the first septum extends vertically towards the second skin.
1. An acoustic panel, comprising:
a perforated first skin;
a second skin; and
a core connected to the perforated first skin and the second skin, the core including a plurality of chambers, a first chamber body, a second chamber body and a plurality of septums respectively arranged with the plurality of chambers;
the plurality of chambers including a first chamber and a second chamber, the first chamber extending vertically between the perforated first skin and the second skin; and
the plurality of septums including a first septum that extends laterally across the first chamber, the first septum including a first septum orifice, and the first septum tapering laterally inward towards the first septum orifice as the first septum extends vertically towards the second skin;
the first chamber body circumscribing and forming the first chamber between the perforated first skin and the second skin, and the first septum connected to the first chamber body;
the second chamber body circumscribing and forming the second chamber between the perforated first skin and the second skin; and
a first wall of the first chamber body laterally adjacent and angularly offset from a second wall of the second chamber body, and an edge of the first wall abutted against an edge of the second wall.
2. The acoustic panel of claim 1 , wherein the first septum is configured to divide the first chamber into a first cavity and a second cavity that is fluidly coupled with the first cavity by the first septum orifice.
3. The acoustic panel of claim 2 , wherein
the first cavity extends vertically from the perforated first skin to the first septum; and
the second cavity extends vertically from the first septum to the second skin.
4. The acoustic panel of claim 1 , wherein the first septum is configured with a funnel-shaped body.
5. The acoustic panel of claim 1 , wherein the first septum projects vertically out from the perforated first skin towards the first septum orifice.
6. The acoustic panel of claim 1 , wherein the first septum orifice has a polygonal cross-sectional geometry.
7. The acoustic panel of claim 1 , wherein the first septum orifice has a circular cross-sectional geometry.
8. The acoustic panel of claim 1 , wherein the first septum has a square cross-sectional geometry or a rectangular cross-sectional geometry.
9. The acoustic panel of claim 1 , wherein
the first septum includes a plurality of septum walls including a first septum wall and a second septum wall;
the first septum wall meets the second septum wall at a corner; and
the first septum wall and the second septum wall each extend to and partially form the first septum orifice.
10. The acoustic panel of claim 1 , wherein the first chamber body has a square cross-sectional geometry or a rectangular cross-sectional geometry.
11. The acoustic panel of claim 1 , wherein at least the perforated first skin, the second skin and the core form a component of an aircraft propulsion system.
12. The acoustic panel of claim 1 , wherein the core is formed from a folded sheet of material.