Nonsynchronous forced vibration in centrifugal compressors
Flow instabilities in centrifugal compressors produce low-frequency turbulence and pulsations, resulting in nonsynchronous rotor vibrations, vibrations of the case and attached piping, speed modulations, and reduced compressor performance. High-frequency pulsations in rotating equipment typically occur at multiples of running speed such as blade, diffuser, and nozzle passing frequencies and can excite blade natural frequencies and radial shell wall resonances. The piping lateral-mechanical and acoustical natural frequencies are generally at lower frequencies and are not excited by these pulsations. Two case histories illustrate the effects and symptoms of subsynchronous pulsation and vibration in centrifugal equipment.
- OSTI ID:
- 6364800
- Journal Information:
- Turbomach. Int.; (United States), Journal Name: Turbomach. Int.; (United States) Vol. 24; ISSN TUIND
- Country of Publication:
- United States
- Language:
- English
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