Patent ID: 11952946
Assignee: RTX CORPORATION
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 22:
23. A turbine engine comprising:
a compressor;
a combustor;
a turbine;
a gaspath passing downstream from the compressor through the combustor and then through the turbine;
a fuel source;
a fuel flowpath from the fuel source to the combustor; and
a heat exchanger for transferring heat from the gaspath to the fuel flowpath,
wherein the heat exchanger comprises:
an inner wall in heat transfer relation with the gaspath;
an outer wall;
tubes between the inner wall and the outer wall bounding respective segments of the fuel flowpath;
a heat transfer fluid between the inner wall and the outer wall and in heat transfer relation with the tubes and the inner wall; and
means for accommodating differential thermal expansion of the inner wall relative to the tubes.