Method and apparatus for aircraft inlet ice protection

The present invention is directed toward methods and apparatuses for protecting acoustically treated aircraft inlets from ice formation. An inlet ice protection system, and methods for making and using ice protection systems. In one embodiment, the inlet includes an acoustic liner positioned forward...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Breer, Marlin D, Olsen, Ronald F, Kunze, Jr., Robert K, Riedel, Brian L
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:The present invention is directed toward methods and apparatuses for protecting acoustically treated aircraft inlets from ice formation. An inlet ice protection system, and methods for making and using ice protection systems. In one embodiment, the inlet includes an acoustic liner positioned forward of the inlet throat and has a perforated face sheet, a perforated back sheet, and an acoustic core between the face sheet and the back sheet. The perforations through the face sheet are sized to allow acoustic energy to be transmitted to and dissipated in the acoustic core, and the perforations in the back sheet are sized to transmit hot gas through the acoustic liner to the surface of the inlet to heat the inlet and prevent and/or restrict ice formation on the inlet. The face sheet can have a higher porosity than the back sheet, and both the sheets and the core can be formed from titanium to withstand high gas temperatures.