Fuel heat exchanger with a barrier
A heat exchanger includes a first channel with at least one first wall for porting a first fluid and a second channel with at least one second wall for porting a second fluid. The heat exchanger includes a barrier chamber located between the at least one first wall and the at least one second wall such that a rupture of one of the at least one first wall and the at least one second wall does not result in mixing of the first fluid and the second fluid. The heat exchanger includes a support member that extends between the at least one first wall and the at least one second wall.
1. A heat exchanger comprising:
a plurality of first channels for porting air, wherein each first channel is defined by a plurality of walls;
a plurality of second channels for porting fuel, wherein each second channel is defined by an annular wall, and wherein each second channel is interspersed among the plurality of first channels in an alternating fashion;
a barrier chamber surrounding the annular wall of the second channel and located between the plurality of walls of the first channel and the annular wall of the second channel, wherein the barrier chamber is configured such that a rupture of one of the plurality of walls and one of the annular walls does not result in mixing of the air and the fuel; and
a plurality of support members, each support member extending between the annular wall of one of the second channels and one of the plurality of walls of one of the plurality of first channels, wherein the support members are configured to transfer heat from the plurality of first channels to the plurality of second channels.
2. The heat exchanger of claim 1 , wherein the barrier chamber is formed of graphite.
3. The heat exchanger of claim 1 , wherein the plurality of walls of the plurality of first channels and the annular walls of the plurality of second channels are formed of Inconel 625.
4. The heat exchanger of claim 1 , wherein the support members are formed of Inconel 625.
5. The heat exchanger of claim 1 , wherein the plurality of first channels each have a triangular shape.
6. The heat exchanger of claim 1 , wherein the plurality of first channels each have a rectangular or square shape.
7. The heat exchanger of claim 1 , wherein the plurality of walls, the annular walls, and the plurality of support members are an additively manufactured structure.