How is the HP turbine rotor of the LM2500 GTE cooled?

Correct Answer: Option C — By a continuous flow of compressor discharge air

The high-pressure turbine rotor operates in the hottest section of the engine. To maintain structural integrity, it is cooled by a continuous flow of compressor discharge air. This air is bled from the compressor, passed through internal cooling passages in the turbine blades and vanes, and then exhausted into the gas path.