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TECHNICAL PAPERS

Understanding Friction Factor Behavior in Liquid Annular Seals With Deliberately Roughened Surfaces

[+] Author and Article Information
Larry A. Villasmil, Dara W. Childs

Turbomachinery Laboratory, Department of Mechanical Engineering, Texas A&M University, College Station, TX 77843

Hamn-Ching Chen

Ocean Engineering Program, Department of Civil Engineering, Texas A&M University, College Station, TX 77843

J. Tribol 127(1), 213-222 (Feb 07, 2005) (10 pages) doi:10.1115/1.1828071 History: Received December 18, 2003; Revised September 22, 2004; Online February 07, 2005
Copyright © 2005 by ASME
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References

Figures

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Central seal of a multistage centrifugal pump 27
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Large knurl geometry and physical dimensions
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Large recess geometry and physical dimensions
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Nava’s experimental results, knurl patterns 13
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Nava’s experimental results, recess patterns 13
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2D periodic units; large knurl, and small recess
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Numerical results, large knurl pattern
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Numerical results, large recess pattern
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Numerical results, small knurl pattern
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Numerical results, small recess pattern
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Numerical friction factor in knurl geometries (a) big (b) large (c) small (d) tiny
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Numerical friction factor in recess geometries (a) big (b) large (c) small (d) tiny
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Force balance in the recess pattern geometry
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Static pressure force to total force ratio
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Periodic static pressure, Re≈2⋅104
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2D periodic unit geometries. Summary of friction-factor-to-clearance behavior.
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Mean flow streamlines, large knurl versus tiny recess

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