Gas Turbines USCG Question #460 (Set 7)

What is the primary purpose of the diffuser and distributor on the GE LM2500 gas turbine?

Official USCG Answer & Rule Citation

Correct Answer: Option C — To provide uniform airflow to the combustor

The diffuser and distributor assembly is designed to decelerate the high-velocity air exiting the compressor and redirect it into the combustor. This process converts kinetic energy into static pressure and ensures a uniform, stable airflow pattern, which is critical for efficient, complete combustion and preventing localized hot spots.

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