Gas turbine engine with a fluid conduit system and a method of operating the same

A method of operating a gas turbine engine having a compressor section and a turbine section in serial flow arrangement, a first conduit in fluid communication with the compressor section and the turbine section, a first heat exchanger positioned in thermal communication with a flow of air through the first conduit, a second conduit in fluid communication with the first conduit at a location downstream of the first heat exchanger and in fluid communication with the turbine section, and a flow control device positioned in flow communication with the second conduit, the method comprising:

• extracting the flow of air from the compressor section into the first conduit;
• flowing the extracted flow of air through the first conduit to a first location at the turbine section, wherein the second conduit is in fluid communication with the turbine section at a second location;
• flowing a heat transfer fluid to the first heat exchanger, the heat transfer fluid in thermal communication with the extracted flow of air through the first conduit via the first heat exchanger;
• and
• modulating, via the flow control device, a portion of the flow of air extracted from the first conduit to the second conduit downstream of the first heat exchanger.