Additively manufactured tube array

1. An additively manufactured tube array comprising:

an outer wall defining a primary flow passage, the outer wall formed by a plurality of curved segments, each of the plurality of curved segments defining a fixed radius and a length, wherein the length of at least two of the plurality of curved segments is different; and

a plurality of divider walls positioned within the primary flow passage to divide the primary flow passage into a plurality of tubes, each of the plurality of tubes being defined at least in part by one of the plurality of curved segments and two of the plurality of divider walls, and wherein each of the plurality of curved segments partially defines one of the plurality of tubes.

2. The additively manufactured tube array of claim 1 , wherein the plurality of tubes are perimeter tubes, the additively manufactured tube array further comprising:

one or more inner tubes defined by three or more of the plurality of divider walls.

3. The additively manufactured tube array of claim 2 , wherein each of the inner tubes are defined by six of the plurality of divider walls.

4. The additively manufactured tube array of claim 3 , wherein each of the inner tubes defines a hexagonal cross section.

5. The additively manufactured tube array of claim 1 , wherein each of the plurality of divider walls defines an intersection angle with an adjacent divider wall, the intersection angle being between about 85 degrees and 155 degrees.

6. The additively manufactured tube array of claim 5 , wherein the intersection angle is approximately 120 degrees.

7. The additively manufactured tube array of claim 1 , wherein the plurality of divider walls are substantially straight within a plane perpendicular to a central axis.

8. The additively manufactured tube array of claim 1 , wherein the plurality of divider walls have a substantially uniform thickness.

9. The additively manufactured tube array of claim 1 , wherein the plurality of divider walls define a localized thinned region.

10. The additively manufactured tube array of claim 1 , wherein the plurality of divider walls define one or more perforations providing fluid communication between adjacent tubes.

11. The additively manufactured tube array of claim 1 , wherein a center of each of the plurality of tubes is spaced apart from the center of adjacent tubes by a center spacing distance, the center spacing distance being greater than or equal to the fixed radius.

12. The additively manufactured tube array of claim 1 , wherein each of the plurality of tubes extends between a tube inlet and a tube outlet along a central axis, the tube array further comprising:

an inlet manifold providing fluid communication between an array inlet and the tube inlets; and

an outlet manifold providing fluid communication between the tube outlets and an array outlet.

13. The additively manufactured tube array of claim 12 , wherein the central axis is curved between the array inlet and the array outlet.

14. The additively manufactured tube array of claim 12 , wherein the inlet manifold, the outer wall, the plurality of divider walls, and the outlet manifold are integrally formed as a single monolithic component.

15. The additively manufactured tube array of claim 1 , wherein the tube array comprises a plurality of layers formed by:

depositing a layer of additive material on a bed of an additive manufacturing machine; and

selectively directing energy from an energy source onto the layer of additive material to fuse a portion of the additive material.

16. The additively manufactured tube array of claim 1 , wherein the outer wall defines a height and a width, the width being greater than the height.

17. The additively manufactured tube array of claim 16 , wherein the height is less than one half the width.

18. The additively manufactured tube array of claim 1 , wherein at least one of the plurality of divider walls is non-linear within a plane perpendicular to a central axis.