Aircraft heat exchange system with multiple heat exchangers

An assembly for an aircraft powerplant, comprising:

• an engine core including a compressor section, a combustor section and a turbine section;
• a bypass flowpath disposed outside of the engine core;
• a bifurcation structure extending radially across the bypass flowpath, the bifurcation structure comprising a structure passage that extends through the bifurcation structure from a passage inlet into the structure passage to a passage outlet out from the structure passage, and the passage inlet fluidly coupling the structure passage to the bypass flowpath;
• a first heat exchanger disposed within the bifurcation structure along the structure passage between the passage inlet and the passage outlet;
• a second heat exchanger disposed within the bifurcation structure along the structure passage between the passage inlet and the passage outlet;
• and
• a flow diverter upstream of the first heat exchanger and the second heat exchanger along the structure passage, the flow diverter configured to selectively divert airflow to at least one of the first heat exchanger or the second heat exchanger.

An assembly for an aircraft powerplant, comprising:

• an engine core including a compressor section, a combustor section and a turbine section;
• a bypass flowpath disposed outside of the engine core;
• a bifurcation structure extending radially across the bypass flowpath, the bifurcation structure comprising a structure passage that extends through the bifurcation structure from a passage inlet into the structure passage to a passage outlet out from the structure passage, and the passage inlet fluidly coupling the structure passage to the bypass flowpath;
• a first heat exchanger disposed within the bifurcation structure along the structure passage between the passage inlet and the passage outlet;
• and
• a second heat exchanger disposed within the bifurcation structure along the structure passage between the first heat exchanger and the passage outlet, wherein the structure passage is configured such that at least substantially all air flowing through the second heat exchanger is received from the first heat exchanger.