Heat exchanger for aircraft engine

A heat exchanger for an aircraft engine, the heat exchanger being disposed along a curved surface in the aircraft engine and configured to cool cooling target fluid when being exposed to an airflow flowing in the engine, the heat exchanger comprising:

• a body including a plate-like first member and a plate-like second member that are stacked in a thickness direction of the first and second members and joined together, and a channel which is defined in the body and in which the cooling target fluid flows;
• and
• a plurality of corrugated fin plates disposed in the channel in the body, wherein:
• the body is bent along the curved surface,
• a plurality of heat dissipation fins stand on an outer surface of at least one of the first member or the second member,
• the first member has a recessed portion that is recessed relative to a surface to which the second member is joined and that is open at the surface,
• the corrugated fin plates are disposed in the recessed portion of the first member,
• the second member is joined to, and overlaps, the first member such that the corrugated fin plates cover an opening of the recessed portion of the first member while being disposed in the recessed portion,
• the body includes:
• a channel portion in which the corrugated fin plates disposed in the recessed portion are held between the first member and the second member in the thickness direction;
• and
• a header portion which communicates with the channel portion and in which the corrugated fin plates are not disposed in the recessed portion and which is disposed between the first member and the second member,
• the first member or the second member has a communication hole that penetrates the first member or the second member in the thickness direction and communicates with the header portion, and
• one of the corrugated fin plates which is adjacent to the header portion has a fin pitch smaller than those of the other corrugated fin plates.