Rotor Whirl Measurements on a Long Rotating Cylinder Partially Filled With Liquid

[+] Author and Article Information
J. Colding-Jo̸rgensen

O̸degaard & Danneskiold-Samso̸e ApS, Kroghsgade 1, DK-2100 Copenhagen 0, Denmark

J. Vib. Acoust 115(2), 141-144 (Apr 01, 1993) (4 pages) doi:10.1115/1.2930323 History: Received October 01, 1991; Revised April 01, 1992; Online June 17, 2008


A theoretical analysis of a long flexibly suspended, rotating cylinder partially filled with liquid has been presented earlier (Colding-Jo̸rgensen, 1990). Special emphasis has been placed on dynamic stability, application in centrifuges, and the influence of external damping. The present paper presents experimental results for comparison with the theoretical analysis, especially in regard to unstable speed ranges, whirl speed relative to rotational speed, and limit cycle amplitudes with external damping. The theory agrees quantitatively with regard to speed ranges and whirl frequency ratios but only qualitatively with regard to whirl amplitudes, indicating the need for further development of the nonlinear analysis of the fluid motion with external damping.

Copyright © 1993 by The American Society of Mechanical Engineers
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