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ACOUSTIC PANEL FOR AN AIRCRAFT NACELLE AIR INLET WITH CASTELLATED RESISTIVE SKIN, PROPULSION UNIT AND AIRCRAFT FITTED WITH SUCH ACOUSTIC PANELS
ACOUSTIC PANEL FOR AN AIRCRAFT NACELLE AIR INLET WITH CASTELLATED RESISTIVE SKIN, PROPULSION UNIT AND AIRCRAFT FITTED WITH SUCH ACOUSTIC PANELS
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机译:用于飞机机舱空气进气的声学板,带有基石电阻皮肤,推进装置和飞机配有这种声学板
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摘要
An acoustic panel for an aircraft nacelle air intake comprising a resistive skin perforated by noise absorption holes and a core against which the resistive skin extends, wherein the resistive skin has a smooth visible face and a castellated rear face with alternating ribs and grooves. The noise absorption holes are formed exclusively in the grooves, i.e., in a zone where the skin is less thick, which enables the holes to have a diameter that is both greater than the thickness of the skin and small enough not to have any impact on drag. The mechanical strength of the resistive skin provided by the ribs ensures that the lesser thickness of the resistive skin in the grooves does not render the resistive skin overly flexible.
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