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
2016-07-28
Patent
Elektronische Ressource
Englisch
INNER BARREL OF AN ENGINE INLET WITH LASER-MACHINED ACOUSTIC PERFORATIONS
Europäisches Patentamt | 2019
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