Heat exchanger for embedded engine applications

An annular heat exchanger for a gas turbine engine, comprising:

• a first annular ring comprising a first main tube defined by a plurality of transduct segments;
• a second annular ring comprising a second main tube defined by a plurality of transduct segments, wherein each transduct segment of the first main tube and the second main tube comprises:
• a main tube extending from a first end to a second end and defining a hollow passageway therethrough, and wherein the main tube defines an aperture, and further wherein at least a portion of adjacent transduct segments are fluidly connected along the main tube;
• a lower platform attached to an outer surface of the main tube on a first side of the aperture;
• and
• an upper platform attached to the outer surface of the main tube on a second side of the aperture that is opposite of the first side, wherein the upper platform is integral with the lower platform to define a supply channel therebetween, the supply channel being in fluid communication with the hollow passageway of the main tube through the aperture defined by the main tube, and wherein the lower platform and the upper platform define an interface defining a plurality of channels in fluid communication with the hollow passageway defined by the main tube;
• and
• at least one curvilinear plate, each defining at least one channel therein, wherein the at least one channel of the at least one curvilinear plate is in fluid communication with a transduct segment of the first main tube and a transduct segment of the second main tube.