Circular crossflow heat exchanger

A heat exchanger defining an axial direction, a radial direction, and a circumferential direction, the heat exchanger comprising:

• a plurality of heat exchange modules stacked along the axial direction to define a flow passageway,
• wherein each of the plurality of heat exchange modules has a substantially curved closed geometry defining a perimeter and a central axis that extends along the axial direction,
• wherein each of the plurality of heat exchange modules comprises:
• a first heat exchanging fluid inlet;
• a first heat exchanging fluid outlet;
• and
• a plurality of heat exchange tubes fluidly coupling the first heat exchanging fluid inlet and the first heat exchanging fluid outlet,
• wherein the plurality of heat exchange tubes define a plurality of first heat exchanging fluid flow passages and a plurality of second heat exchanging fluid flow passages, and
• wherein the plurality of heat exchange tubes maintain a substantially equal distance between adjacent heat exchange tubes of the plurality of heat exchange tubes, and wherein each of the plurality of first heat exchanging fluid flow passages is adjacent to one of the plurality of second heat exchanging fluid flow passages.

A method of manufacturing a heat exchanger, the method comprising:

• 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 and form the heat exchanger,
• wherein the heat exchanger defines an axial direction, a radial direction, and a circumferential direction, and comprises:
• a plurality of heat exchange modules stacked along the axial direction to define a flow passageway, each of the plurality of heat exchange modules having a substantially curved closed geometry defining a central axis that extends along the axial direction, each of the plurality of heat exchange modules comprising:
• a first heat exchanging fluid inlet;
• a first heat exchanging fluid outlet;
• and
• a plurality of heat exchange tubes fluidly coupling the first heat exchanging fluid inlet and the first heat exchanging fluid outlet,
• wherein the plurality of heat exchange tubes defining a plurality of first heat exchanging fluid flow passages and a plurality of second heat exchanging fluid flow passages,
• wherein the plurality of heat exchange tubes maintain a substantially equal distance between adjacent heat exchange tubes of the plurality of heat exchange tubes, and wherein each of the plurality of first heat exchanging fluid flow passages is adjacent to one of the plurality of second heat exchanging fluid flow passages.