For the GE LM2500 gas turbine engine shown in the illustration, the HP turbine 2nd stage blades are cooled by convection, with the cooling air being discharged where? Illustration GT-0011

Correct Answer: Option D — Blade tips.

HP turbine 2nd stage blades in the GE LM2500 utilize internal convection cooling. The cooling air enters the blade root and is discharged through the blade tips. This design effectively removes heat from the airfoil, maintaining structural integrity under the extreme thermal stresses of the high-pressure turbine environment.