Question 84Gas Turbine - 1st Asst/Chief
70% to passThe purpose of the air shroud (swirl cup) around the tip of the fuel nozzle of an GE LM2500 gas turbine engine is which of the following?
Acool the nozzle tip
Bpromote air turbulence
Cpromote air/fuel mixing
Dall of the above
AI Explanation
The correct answer is D) all of the above. The air shroud (swirl cup) around the fuel nozzle tip of a GE LM2500 gas turbine engine serves multiple purposes: 1. It helps to cool the nozzle tip, preventing excessive heating and potential coking or clogging of the nozzle. 2. It promotes air turbulence around the nozzle, which enhances the air/fuel mixing for more efficient combustion. 3. The combination of cooling and air turbulence helps to atomize the fuel and promote a better air/fuel mixture, leading to more complete and efficient combustion. The other answer choices, while addressing individual aspects, do not capture the full, multi-purpose function of the air shroud design.
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