A Three-Dimensional Foil Bearing Performance Map Applied to Oil-Free Turbomachinery
Final rept. Jan-Aug 2007
NATIONAL AERONAUTICS AND SPACE ADMINISTRATION CLEVELAND OH GLENN RESEARCH CENTER
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To effectively apply compliant foil gas bearings to increasingly larger and more challenging turbomachinery, a comprehensive method that compares a foil bearings capabilities with the applications operating requirements is needed. Extensive laboratory and field experience suggests foil bearing failure is generally due to thermal stress brought on by excessive viscous power loss therefore a map that graphically relates component and system-level parameters bearing size, applied loads, and shaft rotational speeds directly to bearing power loss is more elucidating than a map based on a lumped speedload parameter like the Sommerfeld number. In this report we describe a performance map featuring a three-dimensional contour plot.
- Hydraulic and Pneumatic Equipment
- Machinery and Tools