The purpose of the air shroud (swirl cup) around the tip of the fuel nozzle of an LM2500 GTE is to __________.

Correct Answer: Option D — All of the above

The air shroud, or swirl cup, serves multiple critical functions: it cools the nozzle tip to prevent carbon buildup, promotes rapid mixing of fuel and air for efficient combustion, and stabilizes the flame front. This ensures complete combustion and prevents localized hot spots within the primary combustion zone.