NDLI: Rotordynamic Testing and Evaluation of a Large Centrifugal Compressor Using a Magnetic Bearing Exciter

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Thomas, A. Soulas Mark, J. Kuzdzal
Copyright Year	2009
Abstract	Large centrifugal compressors have at times shown to be challenging applications from a rotordynamic standpoint. Inherent rotordynamic stability and robust synchronous response to unbalance are critical for the compressor to function in the field in a reliable manner. State-of-the-art analytical prediction techniques and comprehensive test verification procedures are necessary to ensure the acceptability of the design of such machinery. A full-scale test vehicle was developed and assembled at the authors’ company’s test facility in order to duplicate the design of typical large multi-stage centrifugal compressors. The machine features a number of unique attributes that enable the comprehensive study and evaluation of its aero-thermodynamic as well as rotordynamic performance under different test conditions. In particular, a large Magnetic Bearing Exciter is mounted on one end of the compressor shaft and is used to introduce forces of varying magnitude and frequency to assess the response of the rotor system as well as its rotordynamic stability. Test data (including vibration signals recorded by proximity probes located at the mid-span of the rotor) are compared with analytical predictions for critical speed location, amplification factor and logarithmic decrement. Good correlation between measurements and calculations was achieved, as well as compliance with the standard American Petroleum Institute (API) requirements.
Sponsorship	International Gas Turbine Institute
Starting Page	1055
Ending Page	1062
Page Count	8
File Format	PDF
ISBN	9780791848876
DOI	10.1115/GT2009-60320
e-ISBN	9780791838495
Volume Number	Volume 6: Structures and Dynamics, Parts A and B
Conference Proceedings	ASME Turbo Expo 2009: Power for Land, Sea, and Air
Language	English
Publisher Date	2009-06-08
Publisher Place	Orlando, Florida, USA
Access Restriction	Subscribed
Subject Keyword	Centrifugal compressor Rotordynamics Magnetic bearing exciter Compressors Magnetic bearings Excitation systems Testing
Content Type	Text
Resource Type	Article

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