The effectiveness of an off-line water wash...

Question 1 / 270705eccef9fbacbc34ba4d46bc8

Question 1 of 270705eccef9fbacbc34ba4d46bc8

The effectiveness of an off-line water wash of a GE LM2500 gas turbine engine can be enhanced by doing which of the following?

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Question 1 of 27070

The effectiveness of an off-line water wash of a GE LM2500 gas turbine engine can be enhanced by doing which of the following?

🔍 Key Concepts

• Off-line water wash procedures for gas turbine compressors • Purpose and function of Variable Stator Vanes (VSVs) in an LM2500 • Safety/avoided conditions during washing: hot components, braking, loading

💭 Think About

• Think about which part of the engine you are trying to clean during an off-line water wash and how airflow path and area affect washing coverage. • Consider whether the engine should be producing power, coasting, or just being rotated for a cleaning wash, and why. • Ask yourself what engine features can be adjusted to let water reach more of the fouled compressor surfaces without risking damage.

✅ Before You Answer

• Verify which component (compressor vs. power turbine) actually benefits most from an off-line water wash. • Check which actions are explicitly avoided in washing procedures: using brakes, washing when hot, or approaching idle power. • Confirm which control (speed vs. stator vane position) most directly increases the exposed flow area for the wash water through the compressor.

Question 1 of 27070

The effectiveness of an off-line water wash of a GE LM2500 gas turbine engine can be enhanced by doing which of the following?

Motoring the engine just short of idle speed.

Washing the power turbine while still hot.

Stroking the Variable Stator Vanes to the maximum open position.

Applying the power turbine brake.

Question 1 / 270705eccef9fbacbc34ba4d46bc8

Question 1 of 270705eccef9fbacbc34ba4d46bc8

The effectiveness of an off-line water wash of a GE LM2500 gas turbine engine can be enhanced by doing which of the following?

Back

Question 1 of 27070

The effectiveness of an off-line water wash of a GE LM2500 gas turbine engine can be enhanced by doing which of the following?