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What is surge in a centrifugal compressor?

2020-04-06View Original

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During operation, centrifugal compressors can sometimes experience sudden intense vibrations. The flow rate and pressure of the gas medium also fluctuate significantly, accompanied by periodic dull \"whistling\" sounds, as well as loud \"hissing\" noises caused by the fluctuations in airflow within the piping system. This phenomenon is known as surge condition in centrifugal compressors. The compressor cannot operate for long periods under surge conditions; once it enters such conditions, the operator must immediately take corrective actions by reducing the outlet pressure, or increasing the inlet or outlet flow rate, in order to bring the compressor out of the surge zone and ensure its stable operation.

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