Acoustic panel for a turbomachine and method for the manufacturing thereof
AssigneeSafran
InventorNicola Piccirelli
Life of this patent
Estimating the term…
Abstract
An acoustic panel for a turbomachine, in particular for an aircraft, includes two skins that are substantially parallel and between which extend cavities forming Helmholtz resonators, one of the skins being perforated by orifices opening into the cavities and forming necks of the Helmholtz resonators, vibrating masses being provided in at least some of the cavities and connected to cavity walls by an elastic junction housed in the cavity.
Claims18
An acoustic panel for a turbomachine, the acoustic panel comprising:
- a first skin and a second skin, said first and second skins being parallel;
- a plurality of cavities formed between said first and second skins, said plurality of cavities forming a plurality of Helmholtz resonators;
- and
- a plurality of vibrating masses, wherein at least one vibrating mass of the plurality of vibrating masses is provided within each cavity of said plurality of cavities,
- wherein said first skin is perforated by orifices, said orifices opening into said plurality of cavities and forming necks of said plurality of Helmholtz resonators,
- wherein said second skin is unperforated and defines a cavity wall in each cavity of said plurality of cavities,
- wherein in each cavity of said plurality of cavities, said at least one vibrating mass is connected to said cavity wall by an elastic junction housed in said cavity.
A method of manufacturing an acoustic panel for a turbomachine comprising a first skin and a second skin, said first and second skins being parallel, a plurality of cavities formed between said first and second skins, said plurality of cavities forming a plurality of Helmholtz resonators, and a plurality of vibrating masses, wherein at least one vibrating mass of the plurality of vibrating masses is provided within each cavity of said plurality of cavities, wherein said first skin is perforated by orifices, said orifices opening into said plurality of cavities and forming necks of said plurality of Helmholtz resonators, wherein said second skin is unperforated and defines a cavity wall in each cavity of said plurality of cavities, and wherein in each cavity of said plurality of cavities, said at least one vibrating mass is connected to said cavity wall by an elastic junction housed in said cavity, the method comprising:
- producing said plurality of vibrating masses and said elastic junction by additive manufacturing.
An acoustic panel for a turbomachine, comprising:
- a plurality of parallel skins including a first skin perforated by a plurality of orifices, and a second skin that is unperforated;
- a plurality of cavities extending between the plurality of parallel skins, each cavity forming a Helmholtz resonator, wherein the plurality of orifices of the first skin open into the plurality of cavities, each orifice forming a Helmholtz resonator neck;
- and
- a plurality of vibrating masses, each vibrating mass being located in one cavity of the plurality of cavities and each vibrating mass being connected by an elastic junction to a wall of said cavity in which the elastic junction is located,
- wherein in each cavity of the plurality of cavities, the vibrating mass is connected by the elastic junction to the second skin opposite to the first skin, and the vibrating mass and elastic junction are separated by gaps with respect to two sidewalls of the cavity.
Dependencies are inferred from the claim text.