Feather seal slot arrangement for a CMC BOAS assembly
A flow path component includes a base portion that extends between a first circumferential side and a second circumferential side. A first wall and a second wall extend radially outward from the base portion. The first wall is axially spaced from the second wall to form a passage between the first and second walls. A slot is formed in the first circumferential side. A notch in the base portion extends in a radial direction from the passage to the slot.
1. A flow path component, comprising:
a base portion extending between a first circumferential side and a second circumferential side;
a first wall and a second wall extending radially outward from the base portion, the first wall axially spaced from the second wall to form a passage between the first and second walls;
a slot formed in the first circumferential side;
a notch in the base portion extending in a radial direction from the passage to the slot; and
the component is a ceramic material and the component is formed from a plurality of CMC laminate sheets, and an overwrap ply is arranged outward of the plurality of CMC laminate sheets.
2. The flow path component of claim 1 , wherein the notch extends in an axial direction from the first wall to the second wall.
3. The flow path component of claim 1 , wherein the slot extends in the axial direction beyond the first wall and the second wall.
4. The flow path component of claim 1 , wherein the notch has a width in an axial direction that is at least about 0.14 inches (3.56 mm).
5. The flow path component of claim 1 , wherein the notch has a depth in a circumferential direction of at least about 0.05 inches (1.27 mm).
6. The flow path component of claim 1 , wherein the slot is configured to receive a feather seal and the notch is radially outward of the feather seal.
7. The flow path component of claim 1 , wherein a second slot is formed in the second circumferential side and a second notch extends in the radial direction from the passage to the second slot.
8. The flow path component of claim 1 , wherein the component is a blade outer air seal.
9. The flow path component of claim 1 , wherein the overwrap ply covers ends of the CMC laminate sheets in the base portion.
10. The flow path component of claim 1 , wherein the component comprises a second overwrap ply, the second overwrap ply having a different fiber orientation than the overwrap ply.
11. A flow path component assembly, comprising:
a flow path component having a plurality of segments extending circumferentially about an axis and mounted in a carrier;
at least one of the plurality of segments having a base portion extending from a first circumferential side to a second circumferential side, a first wall and a second wall extending radially outward from the base portion, the first wall axially spaced from the second wall to form a passage between the first and second walls, a slot formed in the first circumferential side, and a notch in the base portion extending in a radial direction from the passage to the slot, wherein the at least one segment is formed from a ceramic material, the at least one segment formed from a plurality of CMC laminate sheets, and an overwrap ply is arranged outward of the plurality of CMC laminate sheets.
12. The flow path component assembly of claim 11 , wherein a feather seal is arranged in the slot.
13. The flow path component assembly of claim 11 , wherein the notch has a width in an axial direction that is at least about 0.14 inches (3.56 mm).
14. The flow path component assembly of claim 13 , wherein the notch has a depth in a circumferential direction of at least about 0.05 inches (1.27 mm).
15. The flow path component assembly of claim 11 , wherein the slot is arranged about halfway between a radially inner side and a radially outer side of the at least one segment.
16. A method of manufacturing a flow path component, comprising:
laying a plurality of laminate sheets to form a body;
machining excess material off the body to form a segment having first and second walls extending from a base portion to define a passage between the first and second walls;
machining the base portion to define a slot in a first circumferential side; and
machining a notch in the base portion extending between the passage and the slot.
17. The method of claim 16 , comprising densifying the body.
18. The method of claim 16 , comprising machining the slot and the notch in a single operation.
19. The method of claim 16 , wherein the notch is formed via ultrasonic machining.
20. The method of claim 16 , wherein the laying a plurality of laminate sheets to form a body comprises wrapping an overwrap ply about at least some of the plurality of laminate sheets.