ACOUSTIC PANEL OF AIR INTAKE OF AN AIRCRAFT NACELLE WITH CRENELLATED RESISTIVE SKIN, AND PROPULSION ASSEMBLY AND AIRCRAFT PROVIDED WITH SUCH ACOUSTIC PANELS

摘要

The invention relates to an aircraft nacelle air intake acoustic panel comprising a resistive skin (1) pierced with sound absorption holes (10), and a core (2) against which the resistive skin extends. (1). characterized in that the resistive skin (1) has a smooth visible face (11) and a crenellated rear face (12) having an alternation of crenellations (14) and trenches (13), the sound absorption holes (10) being formed only in the trenches (13) that is to say in an area where the thickness of the skin is less, which makes it possible to produce holes having a diameter that is both greater than the thickness of the skin. skin and small enough to have no impact on the drag. The smaller thickness of the resistive skin at the level of the trenches does not make it more flexible than the previous skins, the mechanical strength of the resistive skin according to the invention being guaranteed by the crenellations.