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Research Papers: Hydrodynamic Lubrication

Performance Analysis of Full-Film Textured Surfaces With Consideration of Roughness Effects

[+] Author and Article Information
Y. Qiu

Department of Mechanical Engineering, Louisiana State University, 2508 Patrick Taylor Hall, Baton Rouge, LA 70803

M. M. Khonsari1

Department of Mechanical Engineering, Louisiana State University, 2508 Patrick Taylor Hall, Baton Rouge, LA 70803khonsari@me.lsu.edu

1

Corresponding author.

J. Tribol 133(2), 021704 (Mar 22, 2011) (10 pages) doi:10.1115/1.4003303 History: Received May 06, 2010; Revised November 03, 2010; Published March 22, 2011; Online March 22, 2011

A mass-conservative algorithm that implements the Jakobsson–Floberg–Olsson cavitation theory is used to predict the performances of seal-like structures and thrust bearings with a dimpled surface texture. The results of a series of simulations for load-carrying capacity, film thickness, dimple depth, dimple density, cavitation pressure, leakage, and friction force are presented, and the relationship between these performance parameters is studied. It is shown that, under the conditions simulated, surface roughness can improve the load-carrying capacity, but its effect is limited.

Copyright © 2011 by American Society of Mechanical Engineers
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References

Figures

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Figure 1

Structure face with dimples

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Figure 2

Grid for the computation

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Figure 3

The fluid film thickness and load-carrying capacity under different speeds for smooth and rough surfaces with surface rms 0.9 μm and cavitation pressure 0.9×105 Pa

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Figure 4

The fluid film thickness and load-carrying capacity under different speeds for smooth and rough surfaces with surface rms 0.9 μm and cavitation pressure 0.28×105 Pa

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Figure 5

The fluid film thickness and load-carrying capacity under different speeds for smooth and rough surfaces with surface rms 0.2 μm and cavitation pressure 0.9×105 Pa

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Figure 6

The influence of the dimple depth-to-diameter ratio on the load-carrying capacity (film thickness 4 μm and cavitation pressure 0.28×105 Pa)

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Figure 7

The influence of the dimple depth-to-diameter ratio on the load-carrying capacity (film thickness 2 μm and cavitation pressure 0.28×105 Pa)

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Figure 8

The influence of λ on the load-carrying capacity (film thickness 4 μm and surface rms 0.9 μm)

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Figure 9

The influence of λ on the load-carrying capacity (film thickness 2 μm and surface rms 0.2 μm)

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Figure 10

The influence of the dimple density on the load-carrying capacity (Pc=0.9×105 Pa)

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Figure 11

The influence of the dimple density on the load-carrying capacity (Pc=0.28×105 Pa)

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Figure 12

The influence of the cavitation pressure on the load-carrying capacity (film thickness 4 μm)

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Figure 19

Leakage rate (mm3/s) contour map

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Figure 20

Coefficient of friction contour map

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Figure 13

The influence of the cavitation pressure on the load-carrying capacity (film thickness 2 μm)

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Figure 14

The influence of the dimple depth on the leakage

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Figure 15

The dimple depth and the load-carrying capacity relationship

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Figure 16

The influence of the inlet and outlet pressure difference on the leakage

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Figure 17

The influence of the pressure difference on the friction

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Figure 18

Load-carrying capacity (N) contour map

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