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Research Papers: Hydrodynamic Lubrication

On the Behavior of Misaligned Journal Bearings Based on Mass-Conservative Thermohydrodynamic Analysis

[+] Author and Article Information
J. Y. Jang

Department of Mechanical Engineering, Louisiana State University, Baton Rouge, LA 70803

M. M. Khonsari1

Department of Mechanical Engineering, Louisiana State University, Baton Rouge, LA 70803khonsari@me.lsu.edu

1

Corresponding author.

J. Tribol 132(1), 011702 (Nov 11, 2009) (13 pages) doi:10.1115/1.4000280 History: Received June 07, 2009; Revised September 14, 2009; Published November 11, 2009; Online November 11, 2009

Misalignment affects nearly all the bearing performance parameters including the cavitation, thermal field, leakage flow-rate, and moments. The present paper provides a comprehensive analysis of misaligned journal bearings based on a three-dimensional mass-conservative thermohydrodynamic model that appropriately takes into account the film rupture and reformation. An extensive set of numerical solutions are presented to closely examine the effects of misalignment in journal bearings.

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Figures

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Figure 1

System of misaligned journal bearing

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Figure 2

Flow chart of the misaligned bearing

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Figure 3

Comparison present theory with Bouyer and Fillon’s experiments (12)

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Figure 4

Minimum film thickness, density ratio, pressure, and temperature distribution in an aligned journal bearing

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Figure 5

Minimum film thickness, density ratio, and pressure distribution in a mildly misaligned journal bearing (DM=0.75 and α=90 deg)

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Figure 6

Temperature distribution

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Figure 7

Two dimensional film thickness, density ratio, pressure, and temperature (DM=0.75 and α=90 deg)

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Figure 8

Variation in bearing performances with degree of misalignment (α=90 deg)

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Figure 9

Pressure distribution on different degrees of misalignment

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Figure 10

Temperature distribution on different degrees of misalignment

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Figure 11

Variation in bearing performances with misalignment angle α(DM=0.5)

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