Fluid involved in rotative motion (fluid “swirl”) within seals of high speed fluid handling machines is a recognized source of rotor instability. This type of instability leads to the limit cycle of rotor lateral precessional self-excited vibrations of a subsynchronous frequency. The anti-swirl concept is based on the injection of an additional flow to the seal, in the tangential direction, opposite to the direction of the shaft rotation. This flow causes a decrease of the shaft rotation-generated circumferential velocity of the fluid, and improves rotor/seal stability. In this paper the anti-swirl concept is outlined. The mathematical model of the rotor/seal system is analyzed. The analysis and experimental tests establish the physical basis of the anti-swirl concept. The fluid force model, based on the fluid circumferential average velocity of the flow, proves to be an adequate way to represent the seal fluid dynamic forces.
Skip Nav Destination
Article navigation
April 1989
This article was originally published in
Journal of Vibration, Acoustics, Stress, and Reliability in Design
Research Papers
Anti-Swirl Arrangements Prevent Rotor/Seal Instability
A. Muszynska,
A. Muszynska
Bently Rotor Dynamics Corporation, Minden, Nevada
Search for other works by this author on:
D. E. Bently
D. E. Bently
Bently Rotor Dynamics Corporation, Minden, Nevada
Search for other works by this author on:
A. Muszynska
Bently Rotor Dynamics Corporation, Minden, Nevada
D. E. Bently
Bently Rotor Dynamics Corporation, Minden, Nevada
J. Vib., Acoust., Stress, and Reliab. Apr 1989, 111(2): 156-162 (7 pages)
Published Online: April 1, 1989
Article history
Received:
July 1, 1987
Online:
November 23, 2009
Citation
Muszynska, A., and Bently, D. E. (April 1, 1989). "Anti-Swirl Arrangements Prevent Rotor/Seal Instability." ASME. J. Vib., Acoust., Stress, and Reliab. April 1989; 111(2): 156–162. https://doi.org/10.1115/1.3269836
Download citation file:
Get Email Alerts
Cited By
Efficient Hyper-Reduced Small Sliding Tribomechadynamics
J. Vib. Acoust (February 2023)
Modal Analysis of Non-Conservative Combined Dynamic Systems
J. Vib. Acoust (February 2023)
Traveling and Standing Flexural Waves in the Micro-Beam Based on the Fraction-Order Nonlocal Strain Gradient Theory
J. Vib. Acoust (December 2022)
Related Articles
The Multiple Contributions of Jørgen Lund’s Ph.D. Dissertation, Self-Excited, Stationary Whirl Orbits of a Journal in Sleeve Bearings, RPI, 1966, Engineering Mechanics
J. Vib. Acoust (October,2003)
Dynamic Response of an Unbalanced Rigid Rotor Bearing System With a Nonlinear Hydrodynamic Force
J. Comput. Nonlinear Dynam (September,2018)
Influence of Multiphysical Effects on the Dynamics of High Speed Minirotors—Part I: Theory
J. Vib. Acoust (June,2010)
Fluid Dynamic Excitation of Centrifugal Compressor Rotor Vibrations
J. Fluids Eng (March,1978)
Related Proceedings Papers
Related Chapters
Stability and Range
Design and Analysis of Centrifugal Compressors
Research Tools
Bearing Dynamic Coefficients in Rotordynamics: Computation Methods and Practical Applications
Unbalance
Fundamentals of Rotating Machinery Diagnostics