Alstom Technology Limited

Luca Beresini

Peter Marx

Charles Matz

Bernhard Erb

Martin Heinrich Treiber

Bikas Das Burma

In a method of operating a gas turbine during shut down, the gas turbine is decelerated and closure of compressor inlet guide vanes () is initiated at a shaft speed at least 5% above the shaft speed where a vibration peak occurs. The compressor inlet guide vanes () are closed by an angle in the range from 15&#xb0;-35&#xb0;, preferably at a rate between 5&#xb0; and 10&#xb0; per second. The method effects a reduction of the risk of rotational stall.

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Sammjun-Compslsch, Switzerland

Luca Beresini