Which component increases the static pressure of the air at the inlet to the compressor?

Prepare for the EASA Gas Turbine Engine Test. Enhance your learning with multiple choice questions, hints, and in-depth explanations. Ace your exam!

Multiple Choice

Which component increases the static pressure of the air at the inlet to the compressor?

Explanation:
The diffuser increases the static pressure at the inlet to the compressor by slowing the incoming air and converting its velocity (dynamic pressure) into static pressure. By expanding the flow path, it reduces speed, raises static pressure, and provides a smoother, more stable flow into the compressor, which helps avoid surge and improve efficiency. The other components don’t perform this inlet-pressurizing role: the fan mainly adds energy to the flow at an upstream stage, the turbine is downstream and extracts energy, and the compressor raises pressure after the diffuser, not at the entry.

The diffuser increases the static pressure at the inlet to the compressor by slowing the incoming air and converting its velocity (dynamic pressure) into static pressure. By expanding the flow path, it reduces speed, raises static pressure, and provides a smoother, more stable flow into the compressor, which helps avoid surge and improve efficiency. The other components don’t perform this inlet-pressurizing role: the fan mainly adds energy to the flow at an upstream stage, the turbine is downstream and extracts energy, and the compressor raises pressure after the diffuser, not at the entry.

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