Cmc component with cover plate
AssigneeRtx Corporation
InventorsWinston Smiddy, Paul M. Lutjen, Alex J Schneider, Peter Wilkins
Life of this patent
Estimating the term…
Abstract
The disclosure describes methods and devices for directing/controlling cooling air flow for cooling CMC components. A cover plate is positioned within a cooling cavity in the CMC component wherein the cover plate is angled to vary the depth of the cooling cavity between the cover plate and a bottom wall of the cavity. The angled cooling plate can be used to vary the flux of cooling air within the cooling cavity and thereby achieve a desired cooling performance within the cooling cavity.
Claims20
A ceramic matrix composite (CMC) component comprising:
- a base having a radial outer surface and a radial inner surface, the base comprising a plurality of ceramic fiber plies and a ceramic matrix, the radial outer surface having a convex shape,
- at least one cooling cavity within the base that extends from the outer radial surface of the base into an interior region of the base, the at least one cooling cavity having a cavity opening at the outer radial surface of the base, and the at least one cooling cavity being defined by cavity side walls and a cavity bottom wall, and
- a cover plate positioned within the at least one cooling cavity to cover the cavity opening, wherein the cover plate is angled to vary the depth of the cooling cavity between the cover plate and the cavity bottom wall so that the depth varies from a cavity region of greater depth to a cavity region of lesser depth,
- wherein the cover plate has at least one cooling air inlet and the base further including at least one cooling air outlet channel in a circumferential side wall of the CMC component that provides fluid communication between the interior of the at least cooling cavity beneath the cover plate and the exterior of the CMC component.
A BOAS assembly comprising a plurality of BOAS segments according claim 12, wherein the BOAS segments are arranged to form an annular shaped structure.
A (CMC) component comprising:
- a base having a radial outer surface and a radial inner surface, the base comprising a plurality of ceramic fiber plies and a ceramic matrix, the radial outer surface having a convex shape,
- at least one cooling cavity within the base that extends from the outer radial surface of the base into an interior region of the base, the at least one cooling cavity having a cavity opening at the outer radial surface of the base, and the at least one cooling cavity being defined by cavity side walls and a cavity bottom wall, and
- a cover plate positioned within the at least one cooling cavity to cover the cavity opening, wherein the cover plate is angled to vary the depth of the cooling cavity between the cover plate and the cavity bottom wall so that the depth varies from a cavity region of greater depth to a cavity region of lesser depth, and
- one or more retention member(s) for holding the cover plate in position.
A method of controlling cooling air flow within a CMC component, the method comprising:
- providing a CMC component comprising:
- a base having a radial outer surface and a radial inner surface, the base comprising a plurality of ceramic fiber plies and a ceramic matrix, the radial outer surface having a convex shape, and
- at least one cooling cavity within the base that extends from the outer radial surface of the base into an interior region of the base, the at least one cooling cavity having a cavity opening at the outer radial surface of the base, and the at least one cooling cavity being defined by cavity side walls and a cavity bottom wall, and
- positioning a cover plate within the at least one cooling cavity to cover the cavity opening, wherein the cover plate is angled to vary the depth of the cooling cavity between the cover plate and the cavity bottom wall so that the depth varies from a cavity region of greater depth to a cavity region of lesser depth, wherein
- (a) the cover plate has at least one cooling air inlet and the base further including at least one cooling air outlet channel in a circumferential side wall of the CMC component that provides fluid communication between the interior of the at least cooling cavity beneath the cover plate and the exterior of the CMC component, or (b) each blade outer air seal segment further comprises one or more retention member(s) for holding the cover plate in position.
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Dependencies are inferred from the claim text.