The study of dynamic whirl behavior of air bearings is fundamental for an adequate rotordynamic analysis and future validation of numerical predictions. This work shows the dynamic response of the air film on a three-lobe bearing under asynchronous whirl motion. One-dimensional multifrequency orbits are used to characterize the bearing rotordynamic coefficients. The test rig uses two magnetic bearing actuators to impose any given orbits to the journal. The dynamic forces are measured on the test bearing housing by three load cells. Journal whirling excitation is independent of the rotating speed, thus allowing asynchronous excitations. The multifrequency excitation is applied at each rotating speed up to , allowing the asynchronous characterization of the air film. The experimental procedure requires two linearly independent excitation sets. Thus, vertical and horizontal one-dimensional multifrequency orbits are applied as perturbations. Results show the synchronous and asynchronous dynamic coefficients of the air bearing. Asynchronous experimental results are compared to numerical estimation of the bearing force coefficients through solution of the isotropic ideal gas journal bearing Reynolds equation. Numerical dynamic coefficients are obtained as the effective coefficient values of the bearing when subject to a given orbit. A full characterization of the asynchronous rotordynamics coefficients of the bearing is presented in three-dimensional maps.
Skip Nav Destination
Article navigation
September 2008
Research Papers
Asynchronous Dynamic Coefficients of a Three-Lobe Air Bearing
Rafael O. Ruiz,
Rafael O. Ruiz
Laboratorio Dinámica de Máquinas,
Universidad Simón Bolívar
, Caracas 1080-A, Venezuela
Search for other works by this author on:
Marcelo H. Di Liscia,
Marcelo H. Di Liscia
Laboratorio Dinámica de Máquinas,
Universidad Simón Bolívar
, Caracas 1080-A, Venezuela
Search for other works by this author on:
Luis U. Medina,
Luis U. Medina
Laboratorio Dinámica de Máquinas,
Universidad Simón Bolívar
, Caracas 1080-A, Venezuela
Search for other works by this author on:
Sergio E. Díaz
Sergio E. Díaz
Laboratorio Dinámica de Máquinas,
Universidad Simón Bolívar
, Caracas 1080-A, Venezuela
Search for other works by this author on:
Rafael O. Ruiz
Laboratorio Dinámica de Máquinas,
Universidad Simón Bolívar
, Caracas 1080-A, Venezuela
Marcelo H. Di Liscia
Laboratorio Dinámica de Máquinas,
Universidad Simón Bolívar
, Caracas 1080-A, Venezuela
Luis U. Medina
Laboratorio Dinámica de Máquinas,
Universidad Simón Bolívar
, Caracas 1080-A, Venezuela
Sergio E. Díaz
Laboratorio Dinámica de Máquinas,
Universidad Simón Bolívar
, Caracas 1080-A, VenezuelaJ. Eng. Gas Turbines Power. Sep 2008, 130(5): 052502 (7 pages)
Published Online: June 18, 2008
Article history
Received:
April 27, 2007
Revised:
May 7, 2007
Published:
June 18, 2008
Citation
Ruiz, R. O., Di Liscia, M. H., Medina, L. U., and Díaz, S. E. (June 18, 2008). "Asynchronous Dynamic Coefficients of a Three-Lobe Air Bearing." ASME. J. Eng. Gas Turbines Power. September 2008; 130(5): 052502. https://doi.org/10.1115/1.2772635
Download citation file:
Get Email Alerts
Cited By
Image-based flashback detection in a hydrogen-fired gas turbine using a convolutional autoencoder
J. Eng. Gas Turbines Power
Fuel Thermal Management and Injector Part Design for LPBF Manufacturing
J. Eng. Gas Turbines Power
An investigation of a multi-injector, premix/micromix burner burning pure methane to pure hydrogen
J. Eng. Gas Turbines Power
Related Articles
Development of a High Speed Gas Bearing Test Rig to Measure Rotordynamic Force Coefficients
J. Eng. Gas Turbines Power (October,2011)
High-Speed Rotor With Air Bearings Mounted on Flexible Supports: Test Bench and Experimental Results
J. Tribol (April,2008)
On the Evolution of Passive Magnetic Bearings
J. Tribol (April,2022)
Improving the Stability of Labyrinth Gas Seals
J. Eng. Gas Turbines Power (April,2001)
Related Chapters
Summary and Conclusions
Bearing Dynamic Coefficients in Rotordynamics: Computation Methods and Practical Applications
Average Shaft Centerline Plots
Fundamentals of Rotating Machinery Diagnostics
Introduction
Design of Mechanical Bearings in Cardiac Assist Devices