Frame for a heat engine

A turbo machine, the turbo machine defining an inlet end and an outlet end and a core flowpath, the turbo machine comprising:

• a compressor section configured to generate a first flow of fluid;
• a fluid system configured to generate a second flow of fluid to the passage;
• and
• an inlet frame wherein the compressor section is positioned at the outlet end of inlet frame, the inlet frame comprising:
• an inner wall extended from the inlet end to the outlet end, the inner wall forming at least in part the core flowpath and a cavity, the cavity positioned inward of the inner wall, wherein the core flowpath and the cavity are separated by a double wall structure formed by at least a portion of the inner wall, and wherein the double wall structure comprises a plenum extended from the inlet end toward the outlet end of the inlet frame, wherein a first opening provides fluid communication between the cavity and the plenum, and wherein a second opening provides fluid communication between the plenum and the core flowpath, the inner wall configured to receive the first flow of fluid from the compressor section;
• and
• an outer wall extended from the inlet end toward the outlet end of the frame, the outer wall forming a passage extended at least partially around the core flowpath, the outer wall at least partially forming the core flowpath, wherein the outer wall is configured to receive the second flow of fluid from the fluid system, the second flow fluidly separated from the first flow of fluid.