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Research Papers: Hydrodynamic Lubrication

On the Prediction of Cavitation in Dimples Using a Mass-Conservative Algorithm

[+] 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 131(4), 041702 (Sep 21, 2009) (11 pages) doi:10.1115/1.3176994 History: Received February 18, 2009; Revised June 06, 2009; Published September 21, 2009

The Floberg–Jakobsson–Olsson cavitation theory is implemented using a mass-conservative algorithm to accurately predict the behavior of cavitation in flat surfaces enhanced with dimples. The multigrid method is used to accelerate the convergence speed. Comparison is made on different cavitation theories. The results reveal that the load-carrying capacity of dimple-enhanced surfaces is limited under the simulated conditions.

Copyright © 2009 by American Society of Mechanical Engineers
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References

Figures

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Figure 2

Experiment images before and during experiment (300 rpm/SAE10 engine oil)

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Figure 3

Seal face with dimples

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Figure 4

Grid for the computation

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Figure 5

Schematic diagram for multigrid V-cycle

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Figure 6

Flow chart of the programming

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Figure 15

Pressure contours obtained from different theories with different dimple sizes

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Figure 16

Effects of dimple dimension and seal number to seal load obtained using JFO theory

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Figure 17

Effects of dimple dimension and seal number to seal load obtained using Reynolds boundary condition

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Figure 7

Single dimple pressure distribution

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Figure 8

Pressure distribution on the top surface centerline from two simulation results

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Figure 14

Pressure distribution along the centerline of the dimple cell (r=0.023 m)

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Figure 13

Pressure contours of dimple cell obtained from different theories

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Figure 12

Pressure distribution along the center of the journal bearing (z=L/2) obtained using different cavitation boundary conditions

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Figure 11

Multiple dimple cell pressure contour in translational movement simulation

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Figure 10

Multiple and single cells pressure contour comparison

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Figure 9

Journal bearing pressure and film content calculation result, (a) Elrod’s result (12) and (b) current simulation result

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Figure 1

Experiment setup before filling the reservoir

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