Rotating detonation combustion and heat exchanger system

A heat engine, the heat engine comprising:

• a compressor section configured to provide a flow of oxidizer to a rotating detonation combustion (RDC) system;
• the RDC system defining an aft end at which detonation gases exit a detonation chamber and a forward end at which the flow of oxidizer enters the detonation chamber, the RDC system comprising a first outer wall and a second outer wall each extended around a centerline axis;
• wherein the detonation chamber is formed radially inward of the second outer wall;
• wherein a fuel passage is extended between the first outer wall and the second outer wall, the fuel passage comprising a first inlet opening proximate to the aft end through which a flow of fuel is received into the fuel passage, and wherein the flow of fuel is provided through the fuel passage from the aft end to the forward end of the RDC system;
• a fuel injector positioned at the forward end of the RDC system in fluid communication with the fuel passage and the detonation chamber;
• a bypass supply valve positioned at the forward end of the RDC system;
• and
• a control circuit, the control circuit comprising:
• a first sensor configured to receive one or more of a first parameter of a first flow of fuel;
• and
• a second sensor configured to receive one or more of a second parameter of a second flow of fuel, wherein the control circuit provides the first parameter and the second parameter to the bypass supply valve, the bypass supply valve configured to selectively provide the second flow of fuel to the fuel injector based at least on the first parameter and the second parameter.