Engine casing
AssigneeROLLS-ROYCE plc
InventorMalcolm R. James
Life of this patent
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Abstract
An engine casing (16) encloses a rotor (15) and has a wall the inner surface (17) of which has slots (20) therein. An abradable lining (19) is attached to the inner surface (17) of the wall and extends across the slots (20). The abradable lining (19) is fluid permeable so that in operation a fluid passes through the lining (19) and recirculates in the slots (20). Recirculation of the fluid within the slots (20) increases the aerodynamic efficiency of the rotor (15).
Claims9
An engine casing enclosing a rotor, the casing comprising a wall having an inner surface adjacent the rotor, at least a portion of the inner surface of the wall having at least one slot therein, an abradable lining being attached to the inner surface of the wall, the abradable lining being fluid permeable and extending across the slot.
Dependencies are inferred from the claim text.