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Numerical prediction of slip flow effect on gas-lubricated journal bearings for MEMS/MST-based micro-rotating machinery

Title
Numerical prediction of slip flow effect on gas-lubricated journal bearings for MEMS/MST-based micro-rotating machinery
Author
윤준용
Keywords
Gas-lubricated bearings; Slip flow; Knudsen number
Issue Date
2005-02
Publisher
ELSEVIER SCI LTD
Citation
TRIBOLOGY INTERNATIONAL, v. 38, No. 2, Page. 89-96
Abstract
The fluid dynamics of gas-lubricated journal bearings in micro-rotating machinery is different from those of larger size. One point to be considered is a slip flow effect. In this paper, the slip flow effect is considered in order to estimate load-carrying capacity and dynamic coefficients of micro gas-lubricated journal bearings. Based on a modified compressible Reynolds equation including slip flow effect, the first slip approximation was applied. To extract dynamic coefficients, the linearized dynamic equations were formulated by the perturbation method. Numerical predictions compared the static and dynamic characteristics considering slip flow at room-to-high temperature in a range of bearing numbers. The results including load-carrying capacity and dynamic coefficients demonstrate that the slip flow effect becomes significant with temperature increase as well as in the lower range of bearing numbers. (C) 2004 Elsevier Ltd. All rights reserved.
URI
https://www.sciencedirect.com/science/article/pii/S0301679X04000106https://repository.hanyang.ac.kr/handle/20.500.11754/110215
ISSN
0301-679X; 1879-2464
DOI
10.1016/j.triboint.2004.01.003
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MECHANICAL ENGINEERING(기계공학과) > Articles
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