ACOUSTIC LINER AND GAS TURBINE ENGINE WITH SUCH ACOUSTIC LINER

The invention regards an acoustic liner (4) which comprises: a facing sheet (5) that comprises holes (50), the facing sheet (5) having a porosity and a facing sheet thickness (d), a backing sheet (8), and a plurality of cells (7) arranged between the facing sheet (5) and the backing sheet (8), the c...

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Bibliographische Detailangaben
Hauptverfasser:	SERRANO GONZALEZ, Adolfo, RICHTER, Christoph
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ACOUSTICS ACOUSTICS NOT OTHERWISE PROVIDED FOR AIR INTAKES FOR JET-PROPULSION PLANTS BLASTING COMBUSTION ENGINES CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS ENGINE PLANTS IN GENERAL GAS-TURBINE PLANTS HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING,NOISE OR OTHER ACOUSTIC WAVES IN GENERAL MUSICAL INSTRUMENTS NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES PHYSICS SOUND-PRODUCING DEVICES STEAM ENGINES WEAPONS
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Beschreibung
Zusammenfassung:	The invention regards an acoustic liner (4) which comprises: a facing sheet (5) that comprises holes (50), the facing sheet (5) having a porosity and a facing sheet thickness (d), a backing sheet (8), and a plurality of cells (7) arranged between the facing sheet (5) and the backing sheet (8), the cells (7) having a cell depth (L1) and each cell defining a cavity. A plurality of internal necks (6) are provided that extend from the inner side (52) of the facing sheet (5) towards the backing sheet (8), each internal neck (6) being located around a hole (50) of the facing sheet (5), thereby extending the longitudinal length (L2) of the hole (50). The invention further regards a gas turbine engine with such acoustic liner (4).