Pseudospectral Orbit Simulation of Nonideal Gas-Lubricated Journal Bearings for Microfabricated Turbomachines

[+] Author and Article Information
E. S. Piekos, K. S. Breuer

Department of Aeronautics and Astronautics, Massachusetts Institute of Technology, Cambridge, MA 02139

J. Tribol 121(3), 604-609 (Jul 01, 1999) (6 pages) doi:10.1115/1.2834110 History: Received February 02, 1998; Revised July 09, 1998; Online January 24, 2008


A journal bearing simulation tool developed to aid the design of the MIT microturbo-machine bearings is described. This tool uses an orbit method with a pseudospectral technique for treating the Reynolds equation. Comparison is made to various published data. Two types of stability chart are presented and their application to turbo-machine bearing design is discussed. Simulations of imbalance, noncircular geometry, and nonuniform pressures at the bearing ends are also demonstrated.

Copyright © 1999 by Journal of Tribology
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