CERAMIC MATRIX COMPOSITE AIRFOIL TRAILING EDGE ARRANGEMENT

摘要

An airfoil ( 30 ) having a continuous layer of ceramic matrix composite (CMC) material ( 34 ) extending from a suction side ( 33 ) to a pressure side ( 35 ) around a trailing edge portion ( 31 ). The CMC material includes an inner wrap ( 36 ) extending around an inner trailing edge portion ( 38 ) and an outer wrap ( 40 ) extending around an outer trailing edge portion ( 42 ). A filler material ( 44 ) is disposed between the inner and outer wraps to substantially eliminate voids in the trailing edge portion. The filler material may be pre-processed to an intermediate stage and used as a mandrel for forming the outer trailing edge portion, and then co-processed with the inner and outer wraps to a final form. The filler material may be pre-processed to include a desired mechanical feature such as a cooling passage ( 22 ) or a protrusion ( 48 ). The filler material may include an upper layer ( 77 ) and a lower layer ( 78 ) separated by an intermediate layer ( 76 ) that extends to between the inner wrap and the outer wrap along the suction and/or pressure sides.