Open rotor nose cone ram air heat exchanger with exhaust of cooling air through static structure

A method of operating a gas turbine engine comprising the steps of:

• 1) driving a gas turbine engine to rotate a nose cone, the nose cone having a central opening;
• 2) passing a working fluid through a heat exchanger received in the nose cone;
• 3) passing air into the central opening and across the heat exchanger to cool the working fluid;
• 4) passing the air downstream of the heat exchanger outwardly through static structure on the gas turbine engine through at least one static opening;
• and
• 5) controlling a door to selectively open and close the central opening.

A gas turbine engine comprising:

• an open rotor configured to rotate with a nose cone;
• a heat exchanger positioned within the nose cone and a system for using a working fluid, an inlet from the system connected to the heat exchanger and an outlet from the heat exchanger connected back to the system;
• a central opening in a central portion of the nose cone to deliver cooling air across the heat exchanger, and a duct downstream of the heat exchanger to direct the cooling air radially to at least one static opening such that the cooling air can move radially outwardly through static structure and be directed into a propulsion airflow path;
• and
• further comprising:
• a compressor section;
• and
• a turbine section;
• wherein the outer housing surrounds the compressor section and the turbine section and the at least one static opening is located in the outer housing;
• and
• wherein the at least one static opening is downstream of the open rotor.