Enhanced modeling of high-speed compressible lubrication

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Authors
Piela, Sean Garrigan
Issue Date
2017-12
Type
Electronic thesis
Thesis
Language
ENG
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Mechanical engineering
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Abstract
At high sliding speed (Mach number greater than 0.5 but subsonic), it is found that: inertia accounts for about 3-5% of load capacity, the work of expansion or compression (dilation) accounts for about 8-14% of load capacity, and that average lubricant temperature is modified by about 9-17% due to dilation. It is important to note that these aspects of compressibility modify the pressure, temperature, and velocity components; also, that these quantifications strongly depend on bearing (film) geometry. It is found that modeling of heat transfer between lubricant and bearing solid surfaces is of maximal importance in high-speed gas lubrication. This corroborates conclusions of modern experimental studies in high-speed gas lubrication.
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December 2017
School of Engineering
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Rensselaer Polytechnic Institute, Troy, NY
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