Air Compressor Surge?

When the compressor inlet flow small enough, can result in serious throughout the diffuser flow field of the rotating stall. Compressor outlet pressure drop suddenly, make the pipe network pressure is higher than the compressor outlet pressure, forced airflow reversing compressors, has been to pipeline pressure drop to below the compressor outlet pressure, the compressor and the pipeline gas, compressor and resume normal work.

When the pipe network pressure returns to the original pressure, the flow rate is still less than the surge flow rate of the unit, and the compressor generates a rotary stall, the outlet pressure drops, and the air flow in the pipe network flows back to the compressor.

Such a cycle, a flow to the pipe network, a moment back to the compressor, the compressor flow and outlet pressure cycle of large fluctuations, causing the compressor's strong airflow fluctuations, this phenomenon is called compressor surge.

Generally, large pipe network capacity leads to large surge amplitude and low frequency. Conversely, small pipe network capacity leads to small surge amplitude and high frequency.