Wavy CMC Wall Hybrid Ceramic Apparatus
First Claim
1. An apparatus for use in high temperature applications, the apparatus comprising a hybrid ceramic structure comprising:
- a ceramic matrix composite (CMC) wall, at least a portion of which comprises waves, the waves extending a full thickness of the wall to define a first wavy surface and an opposed second wavy surface; and
a ceramic insulating layer comprising a proximal surface bonded with the first wavy surface and comprising a distal surface;
wherein the waves, on a linearized basis, have a thickness of 1 to 10 millimeters, an amplitude excluding the thickness of at least 2 millimeters, the waves'"'"' amplitude further being 1.5 to 6.0 times the thickness, and a period of 1 to 4 times the wave amplitude; and
wherein the waves of the second wavy surface are exposed for an effective backside cooling, and the first wavy surface and a varying thickness of the ceramic insulating layer define a contour of the distal surface.
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Accused Products
Abstract
A ceramic hybrid structure (207, 502, 602, 608) that includes a wavy ceramic matrix composite (CMC) wall (214, 532, 603, 609) bonded with a ceramic insulating layer (230, 538, 604, 610) having a distal surface (242) that may define a hot gas passage (250, 550, 650) or otherwise be in proximity to a source of elevated temperature. In various embodiments, the waves (216, 537, 637) of the CMC wall (214, 532, 603, 609) may conform to the following parameters: a thickness (222) between 1 and 10 millimeters; an amplitude (224) between one and 2.5 times the thickness; and a period (226) between one and 20 times the amplitude. The uninsulated backside surface (218) of the CMC wall (214) provides a desired stiffness and strength and enhanced cooling surface area. In various embodiments the amplitude (224), excluding the thickness (222), may be at least 2 mm.
47 Citations
20 Claims
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1. An apparatus for use in high temperature applications, the apparatus comprising a hybrid ceramic structure comprising:
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a ceramic matrix composite (CMC) wall, at least a portion of which comprises waves, the waves extending a full thickness of the wall to define a first wavy surface and an opposed second wavy surface; and a ceramic insulating layer comprising a proximal surface bonded with the first wavy surface and comprising a distal surface; wherein the waves, on a linearized basis, have a thickness of 1 to 10 millimeters, an amplitude excluding the thickness of at least 2 millimeters, the waves'"'"' amplitude further being 1.5 to 6.0 times the thickness, and a period of 1 to 4 times the wave amplitude; and wherein the waves of the second wavy surface are exposed for an effective backside cooling, and the first wavy surface and a varying thickness of the ceramic insulating layer define a contour of the distal surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A wavy transition for a gas turbine engine comprising:
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a ceramic matrix composite (CMC) wall, at least a portion of which comprises waves, the waves extending a full thickness of the wall to define a first wavy surface and a second wavy surface, and a ceramic insulating layer, comprising a proximal surface bonded with the first wavy surface, and a distal surface defining a non-wavy hot gas passage; an upstream inlet flange; and a downstream outlet flange, wherein the inlet flange and the outlet flange join with the CMC wall that extends between them, and wherein the waves of the second wavy surface are exposed for an effective backside cooling and the waves of the first wavy surface do not define the shape of the distal surface. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A ring segment for a gas turbine engine comprising:
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a hybrid ceramic structure comprising a ceramic matrix composite (CMC) wall, at least a portion of which comprises waves, the waves extending a full thickness of the wall to define a first wavy surface and a second wavy surface; and a ceramic insulating layer, comprising a proximal surface bonded with the first wavy surface, and a distal surface; wherein the waves of the second wavy surface are exposed for an effective backside cooling, and the waves of the first wavy surface do not define the shape of the distal surface. - View Dependent Claims (17, 18, 19, 20)
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Specification