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Research Papers: Other (Seals, Manufacturing)

Study of Hydrostatic Mechanical Face Seals Operating in a Turbulent Rough Flow Regime

[+] Author and Article Information
Noël Brunetière

Laboratoire de Mécanique des Solides, UMR CNRS 6610, Université de Poitiers, S.P.2M.I., BP 30179, Futuroscope Chasseneuil Cedex 86962, Francenoel.brunetiere@lms.univ-poitiers.fr

Bernard Tournerie

Laboratoire de Mécanique des Solides, UMR CNRS 6610, Université de Poitiers, S.P.2M.I., BP 30179, Futuroscope Chasseneuil Cedex 86962, France

J. Tribol 131(3), 032202 (Jun 01, 2009) (11 pages) doi:10.1115/1.3139051 History: Received October 07, 2008; Revised April 15, 2009; Published June 01, 2009

The aim of this paper is to present a turbulence model that allows turbulent flows between smooth and/or rough walls to be dealt with. After analyzing available literature data, an improvement of the Elrod, Ng, and Pan turbulence model is proposed, taking into account the effect of wall asperities. This model is then applied to a hydrostatic mechanical seal that is rough on one face, operating in nonlaminar flow. The roughness is due to particle deposits occurring during the seal operation. As expected, the wall roughness leads to a decrease in leakage rate.

Copyright © 2009 by American Society of Mechanical Engineers
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References

Figures

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Figure 1

Flow between parallel walls

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Figure 2

Universal velocity profile

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Figure 3

Comparison of the theoretical friction factor and the experimental values for varying Reynolds number values

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Figure 4

Velocity profiles for smooth and rough walls

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Figure 5

Velocity profiles for rough walls

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Figure 6

Comparison of the theoretical friction factor and the experimental values for varying roughness height

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Figure 7

Friction factor versus Reynolds number for various roughness heights

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Figure 8

Eddy viscosity along the channel width for different values of the roughness term (Couette flow)

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Figure 9

Roughness coefficient versus the roughness height

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Figure 10

Velocity profile for a Poiseuille flow between smooth walls with Reτ=177

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Figure 11

Eddy viscosity profile for a Poiseuille flow between smooth walls with Reτ=177

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Figure 12

Velocity profile for Couette and Poiseuille flows between rough walls

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Figure 13

Comparison of mean velocity profiles in a channel flow with square bars on one wall

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Figure 14

Configuration of the studied hydrostatic seal

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Figure 15

Opening force at L=20.472 μm and uniform temperature versus the angular velocity for different roughness height values

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Figure 16

Opening force at L=20.472 μm and uniform temperature versus the angular velocity for different roughness height values

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Figure 17

Radial shear stress distribution on the stator at L=20.472 μm and uniform temperature for different roughness height and different angular velocity values

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Figure 18

Centerline clearance at the equilibrium position versus the angular velocity for different roughness height values

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Figure 19

Leakage rate versus the angular velocity for different roughness height values

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Figure 20

Radial velocity distribution in the film for a smooth case and a rough case, with rotation speed set at 3000 rpm

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Figure 21

Temperature distribution in the film for a smooth case and a rough case, with rotation speed set at 3000 rpm

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