“Predicting, Understanding and Avoiding the Ekofisk Rotor Instability Forty Years Later,”
C. Hunter Cloud, John A. Kocur, Jr. & Brian C. Pettinato, 2018.
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An examination restricted only to the centrifugal compressor configuration as based on 1970’s aerodynamic technology ignores the advances made in impeller and compressor design. The current rotor configuration process includes factors to optimize both aerodynamic performance and rotordynamic behavior which tend to work toward opposing design goals. To complete this cursory review of the impact of compressor design improvements, the Ekofisk reinjection compressor is reconfigured as would be selected with today’s methods and capabilities. The rotordynamic behavior of the newly designed machine is compared against the original.