As shown in the illustration, the HP turbine 2nd stage blades are cooled by convection, with the cooling air being discharged at the _________. Illustration GT-0011

Correct Answer: Option B — blade tips

High-pressure turbine second-stage blades utilize internal convection cooling, where air flows through the blade and is discharged at the blade tips. This design effectively manages the thermal gradient across the blade, preventing localized overheating and ensuring the structural integrity of the rotating components under high-temperature gas flow conditions.