Question 56Gas Turbine - Assistant Engineer
70% to passFor the GE LM2500 gas turbine engine shown in the illustration, the HP turbine 1st stage nozzle vanes are cooled by which of the following? Illustration GT-0020
A8th stage compressor air.
B9th stage compressor air.
C13th stage compressor air.
D16th stage compressor air.
AI Explanation
The correct answer is D) 16th stage compressor air. The HP turbine 1st stage nozzle vanes in the GE LM2500 gas turbine engine are cooled by the 16th stage compressor air. This is because the 16th stage compressor air has the highest pressure and temperature, making it the most suitable source for cooling the high-pressure turbine components that are exposed to the highest temperatures in the engine. The other options, A) 8th stage, B) 9th stage, and C) 13th stage compressor air, are not correct because they do not have the necessary pressure and temperature characteristics to effectively cool the HP turbine 1st stage nozzle vanes.
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