How is the HP turbine rotor of the GE LM2500 gas turbine cooled?
Official USCG Answer & Rule Citation
Correct Answer: Option C — By a continuous flow of compressor discharge air
The high-pressure turbine rotor of the LM2500 is cooled by a continuous flow of compressor discharge air. This air is directed through internal cooling circuits within the turbine blades and disks. This convective cooling is essential to maintain the metallurgical properties of the turbine components under high-temperature operating conditions.
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