Wavy CMC wall hybrid ceramic apparatus

Details Wavy CMC wall hybrid ceramic apparatus Wavy CMC wall hybrid ceramic apparatus

2011-03-22

2011-03-22

Cuff, Michael (Department: 3741)

Power plants

Combustion products used as motive fluid

Combustion products generator

C428S034600, C415S173400

Reexamination Certificate

active

07908867

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.

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