Experimental Investigation into the Instability of an Over-Hung Rigid Centrifuge Rotor Partially Filled With Fluid
- 20 September 2002
- journal article
- Published by ASME International in Journal of Vibration and Acoustics
- Vol. 124 (4), 483-491
- https://doi.org/10.1115/1.1505027
Abstract
The objective of this paper is to experimentally investigate the instability of an over-hung rigid centrifuge rotor partially filled with fluid. Specific emphasis has been placed on the developing process of rotor instability, the dynamical behavior of the rotor system while the instability occurs, and the frequency and direction of rotor whirl within the unstable region of rotational speeds. The effects of fluid-fill ratio on the rotor whirl frequency, the extent of the unstable region of rotational speeds, and the rotor imbalance are also studied. The detailed results clarify some issues and show some new phenomena on the instability of a rotor partially filled with fluid. The phenomena include: sub-synchronous frequency that does not result in instability of the rotor system and disappears in the unstable region at the larger fluid-fill ratios; different whirl frequencies entering the unstable region for slowly increasing and decreasing rotational speed operations; variable whirl frequency within the unstable region; hysteresis at the upper bound of the unstable region; and a break-down of the fluid free-surface.Keywords
This publication has 13 references indexed in Scilit:
- A Note on Rotor Instability Caused by Liquid MotionsJournal of Applied Mechanics, 1991
- Stability of a Clamped-Free Rotor Partially Filled With LiquidJournal of Applied Mechanics, 1986
- Experiments on Vibrations of a Hollow Rotor Partially Filled with LiquidBulletin of JSME, 1986
- Asynchronous Instability of a Rotating Centrifuge Partially Filled With FluidJournal of Applied Mechanics, 1985
- Self-excited Oscillation of a Hollow Rotating Shaft Partially Filled with a Liquid : 1st Report, Instability Based on the Fluid Force Obtained from Boundary Layer theoryBulletin of JSME, 1985
- Vibrations of an Elastically Mounted Spinning Rotor Partially Filled With LiquidJournal of Mechanical Design, 1982
- Self-Excited Vibration of a Rotating Hollow Shaft Partially Filled with LiquidJournal of Mechanical Design, 1980
- Stability of a Rotor Partially Filled With a Viscous Incompressible FluidJournal of Applied Mechanics, 1979
- Whirl Dynamics of a Rotor Partially Filled With LiquidJournal of Applied Mechanics, 1968
- Experimentelle und theoretische Untersuchungen über die kritischen Drehzahlen flüssigkeitsgefüllter HohlkörperForschung im Ingenieurwesen, 1962