A nacelle may comprise an acoustic panel in an inner fixed structure. The acoustic panel may comprise a top sheet having elongated perforations oriented in a circumferential direction. A low drag liner may be coupled to the top sheet. The orientation of the elongated perforations may result in a greater hoop strength for the top sheet as compared to a top sheet of similar thickness and percent open area having circular perforations.
INNER FIXED STRUCTURE ACOUSTIC PANEL WITH DIRECTIONAL PERFORATIONS
28.07.2016
Patent
Elektronische Ressource
Englisch
INNER BARREL OF AN ENGINE INLET WITH LASER-MACHINED ACOUSTIC PERFORATIONS
Europäisches Patentamt | 2019
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