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- W3127777350 abstract "Abstract Hydrogen-cooled two-pole turbogenerators are equipped with one single-stage radial fan for cooling gas ventilation. The impellers with outer diameters of up to 1.5 m operate with 3000 rpm or 3600 rpm. High cycle fatigue cracks have occurred at two radial fan impellers operated at 3000 rpm. An extensive root cause analysis was performed to identify the cause of these cracks. Impeller vibration measurements in the generator unit finally allowed the successful identification of the root cause. The very strong impeller vibrations were caused by an aeroelastic self-excitation mechanism. By modification of the stationary impeller surrounding the aeroelastic self-excitation was eliminated." @default.
- W3127777350 created "2021-02-15" @default.
- W3127777350 creator A5023220930 @default.
- W3127777350 date "1999-09-12" @default.
- W3127777350 modified "2023-10-03" @default.
- W3127777350 title "High Cycle Fatigue Cracks at Radial Fan Impellers Caused by Aeroelastic Self-Excited Impeller Vibrations: Part I — Case History, Root Cause Analysis, Vibration Measurements" @default.
- W3127777350 doi "https://doi.org/10.1115/detc99/vib-8261" @default.
- W3127777350 hasPublicationYear "1999" @default.
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