What do the horizontal and vertical axes of the centrifugal compressor surge curve represent?
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What do the horizontal and vertical axes represent respectively? What parameters are used to calculate it? It seems one is the inlet-to-outlet pressure ratio, while I’m not sure what the other one represents How to calculate it?
The vertical axis represents the compression ratio, which is the ratio of the absolute pressure at the outlet to that at the inlet； The horizontal axis represents flow rate; if it is mass flow rate, the mass flow rate at the inlet is equal to that at the outlet. If it is volume flow rate, it could be the volume flow rate at the inlet or at the outlet ； According to the principle of compressor surge, if the inlet flow rate is less than the critical flow rate, the compressor will experience surge.