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123. For the GE LM2500 gas turbine engine shown in the illustration, the HP turbine 1st stage nozzle vanes are cooled by which of the following
The HP turbine 1st stage nozzle vanes on the GE LM2500 are cooled by air from the 16th stage compressor. This is because the 1st stage nozzles experience the highest gas path temperatures and require the highest-pressure air for effective cooling, which is provided by the 16th stage.
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