This contribution is concerned with the development and the implementation of a foil air journal bearing model. For this purpose, the numerical procedure solving the Reynolds equation for compressible fluids has to be coupled to a compliant foil model. The presented beam-based approach is supposed to reproduce most of the experimentally known particularities in the mechanical behavior of the foil structure, while being at least as runtime-efficient as the commonly used simple elastic foundation model. The developed modeling approach will be validated by comparing simulation results to data found with a more complex reference model. In the analysis part, most notably, the top foil compliance is shown to deteriorate the load-carrying capacity of air bearings. Moreover, the influence of the top foil compliance on the dynamics of a rigid rotor supported by two foil air journal bearings will be discussed.
Computational Analysis of Foil Air Journal Bearings Using a Runtime-Efficient Segmented Foil Model
Contributed by the Fluids Engineering Division of ASME for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received September 8, 2016; final manuscript received August 16, 2017; published online November 7, 2017. Assoc. Editor: Olivier Coutier-Delgosha.
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Leister, T., Baum, C., and Seemann, W. (November 7, 2017). "Computational Analysis of Foil Air Journal Bearings Using a Runtime-Efficient Segmented Foil Model." ASME. J. Fluids Eng. February 2018; 140(2): 021115. https://doi.org/10.1115/1.4037985
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