Identifier

etd-0410103-191114

Degree

Master of Science in Mechanical Engineering (MSME)

Department

Mechanical Engineering

Document Type

Thesis

Abstract

This thesis deals with the development of mathematical models and numerical schemes for simulating the hydrodynamic pressure and temperature rise of compliant foil bearings lubricated by a thin gas film in between its compliant bearing surface and the rotating shaft. The model accounts for the compressibility of gas, the compliance of the bearing surface, and the interaction between the pressure field and temperature field of the gas film in the bearing system. Numerical solutions obtained over a fairly large range of operating speeds show excellent agreement with existing experimental data from both load performance test and bearing temperature measurement. A series of parametric study is presented to illustrate the utility of the developed algorithms for characterization of foil bearing performance and guidance of foil bearing design. The numerical algorithm can handle high speeds and high eccentricity ratios, which allows the prediction of realistic performance and characteristics of foil bearings under extreme operating conditions.

Date

2003

Document Availability at the Time of Submission

Release the entire work immediately for access worldwide.

Committee Chair

Michael Khonsari

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