Additively manufactured heat exchanger

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 for cooling a component, and a cowl at least partially surrounding the component, the cowl defining at least one peripheral gap and at least one cowl plenum, the heat exchanger comprising:
• a housing defining a heat exchange plenum;
• a plurality of heat exchange tubes passing through the heat exchange plenum;
• and
• a discharge manifold defining a discharge plenum in fluid communication with the heat exchange plenum, the discharge manifold being positioned within and bridging the at least one peripheral gap of the cowl;
• an inlet manifold defining an inlet plenum in fluid communication with the heat exchange plenum;
• a fluid outlet defined by the discharge manifold, the fluid outlet providing fluid communication between the discharge plenum and the at least one cowl plenum;
• and
• an impingement baffle at least partially defining the discharge manifold and defining an impingement gap between the impingement baffle and the component, the impingement baffle defining a plurality of cooling holes.

An assembly comprising:

• an annular casing;
• a cowl assembly spaced apart from the annular casing to define an impingement gap, the cowl assembly defining a cowl plenum, a plurality of cowl cooling holes providing fluid communication between the cowl plenum and the impingement gap, and a peripheral gap;
• a heat exchanger positioned within the peripheral gap of the cowl assembly, the heat exchanger comprising:
• a housing defining a heat exchange plenum;
• a plurality of heat exchange tubes passing through the heat exchange plenum;
• an inlet manifold defining an inlet plenum in fluid communication with the heat exchange plenum;
• a discharge manifold defining a discharge plenum in fluid communication with the heat exchange plenum, the discharge manifold being positioned within and bridging the peripheral gap of the cowl assembly;
• a fluid outlet defined by the discharge manifold, the fluid outlet providing fluid communication between the discharge plenum and the cowl plenum;
• and
• an impingement baffle at least partially defining the discharge manifold and defining the impingement gap between the impingement baffle and the annular casing, the impingement baffle defining a plurality of cooling holes.