International Journal of Rotating Machinery / 2011 / Article / Fig 10

Research Article

Design and Characterization of a Centrifugal Compressor Surge Test Rig

Figure 10

Pressure fluctuations in the compressor during the onset of surge at 16,000 rpm: (A) instability initiation—observed audible sound change, (B) initial pressure fluctuations at a frequency near 21 Hz, and (C) pressure fluctuations changed to a lower frequency near 7 Hz as throttle valve closed further.
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