... rotordynamic coefficients impeller-shroud forces Multistage centrifugal compressors using shrouded impellers have been notably subject to rotordynamic instabilities for many years. As a rule, the instabilities are load dependent versus speed dependent. Specifically, above a limiting load condition...

... efforts are needed from a rotordynamic standpoint. A high-pressure, reinjection centrifugal compressor is analyzed in order to predict rotordynamic stability using the best available resources for seals and bearings. Impeller shroud forces are predicted using the bulk-flow model developed by Gupta...