For the GE LM2500 gas turbine engine shown in the illustration, the HP turbine 2nd stage nozzle vanes are cooled by which of the following? Illustration GT-0020

Correct Answer: Option B — 13th stage compressor air.

The GE LM2500 high-pressure turbine 2nd stage nozzle vanes are cooled using 13th stage compressor bleed air. This air provides the necessary cooling flow to maintain the nozzle vanes within their design temperature limits, preventing thermal fatigue and ensuring long-term reliability of the hot section components.