HIGH TEMPERATURE ACOUSTIC LINER

A durable light weight, high temperature acoustic ceramic matrix composite (CMC) liner system. A thin ceramic matrix composite skin, also referred to as a facesheet (106), forms an outer layer of a cell (104) in the CMC liner system, forming the boundary with the flow of hot gases in the exhaust. A...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	YOUNG, Kevin Andrew, YOUNG, Craig Douglas, FAIR, Geoffrey Eric
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	AIR INTAKES FOR JET-PROPULSION PLANTS BLASTING COMBUSTION ENGINES CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS GAS-TURBINE PLANTS HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS JET-PROPULSION PLANTS LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM LIGHTING MECHANICAL ENGINEERING PERFORMING OPERATIONS TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	A durable light weight, high temperature acoustic ceramic matrix composite (CMC) liner system. A thin ceramic matrix composite skin, also referred to as a facesheet (106), forms an outer layer of a cell (104) in the CMC liner system, forming the boundary with the flow of hot gases in the exhaust. A backplate (108) forms the opposite boundary for the cell. The truss structure is formed between the backplate and the facesheet and provides the cell with strength. When the CMC system replaces the metal liner, the backplate thickness is increased so that it is about the thickness of the liner system that it replaces. The truss structure extends between the backplate and the facesheet, forming channels or volumetric spaces. These channels or volumetric spaces are filled with high temperature air permeable acoustic materials (120) that attenuate sound propagated by cooling air in the acoustic range.