Schalldämpfende Auskleidung

Details

Veröffentlichungs-Nr.

EP2466095

Aktenzeichen

EP11192175

Anmeldetag

6. Dezember 2011

Veröffentlichung

4. März 2015

Erteilung

4. März 2015

Rechtsraum

EP

IPC

G01N25/48G01K17/04F02C7/045G01N25/02

Abstract

An acoustic liner for a gas turbine engine comprises a folded cavity (126) with an opening (128) and a resistive facing sheet covering the opening, characterised in that the folded cavity further comprises a resistive septum (132) that increases attenuation at high frequencies. The presence of the septum permits the attenuation of noise over a much wider range of frequencies than in known liners. By suitable choice of the resistance and reactance of the septum and of its position in the cavity (126), the liner can provide low frequency attenuation comparable with known liners while also providing improved attenuation at higher frequencies.

Anmelder

Firma

Rolls-Royce plc

Land

🇬🇧 Großbritannien

Fachgebiete