Experimental Investigation of Externally Pressurized Bearings Under High Knudsen Number Conditions

[+] Author and Article Information
S. Fukui, R. Kaneko

Kaneko Research Section, NTT Electrical Communications Laboratories, Nippon Telegraph and Telephone Corp., Musashino-shi, Tokyo, 180 Japan

J. Tribol 110(1), 144-147 (Jan 01, 1988) (4 pages) doi:10.1115/1.3261554 History: Received March 01, 1987; Online October 29, 2009


The characteristics of the externally pressurized bearings under high Knudsen number conditions were investigated experimentally by the use of surface restriction bearings in a medium vacuum on the order of 0.1 kPa (10−3 atm.). The experimental results agreed well with the numerical results calculated from a generalized lubrication equation based on the Boltzmann equation. Therefore, it would appear that this generalized lubrication equation is valid even when flows are categorized into transition flow or free molecular flow.

Copyright © 1988 by ASME
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