HEAT EXCHANGER

摘要

PURPOSE: A device is provided for plate fin heat exchanger or primary surface plate heat exchanger. CONSTITUTION: An annular heat exchanger (10) suitable for a gas turbine engine comprises a first continuous sheet of material (12) arranged in a spiral and a second continuous sheet of material (14) arranged in a spiral. A first axially extending passage (40) is defined between the first surface (16) of the first sheet (12) and the third surface (20) of the second sheet (14) and a second axially extending passage (46) is defined between the second surface (18) of the first sheet (12) and the fourth surface of the second sheet (14). The first passage (40) is closed at its axial ends by spiral seals between the first sheet (12) and the second sheet (14). The second passage (46) is open at its axial ends. A plurality of radially extending passages (42 and 44) are provided to supply a first fluid at a first end into the first passage (40), to remove the first fluid from a second end of the first passage (40) and to interconnect adjacent turns of the first passage (40). The passages (42 and 44) extend radially through the second passage (46)