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RESEARCH PAPERS

Numerical Modelling of High Pressure Gas Face Seals

[+] Author and Article Information
Sébastien Thomas

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

Noël Brunetière, Bernard Tournerie

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

J. Tribol 128(2), 396-405 (Dec 12, 2005) (10 pages) doi:10.1115/1.2164471 History: Received July 06, 2005; Revised December 12, 2005

An axisymetric numerical model of face seals operating with compressible fluids at high pressure is presented. Inertia terms are included using an averaged method and thermal effects are considered. The real behavior of gases at high pressure is taken into account. An original exit boundary condition is used to deal with choked flow. The model is validated by comparison with experimental data and analytical solutions. Finally, the influence of the operating conditions on the performance of a high-pressure gas face seal is analyzed. It is shown that when the flow is choked, the mass flow rate is reduced and the behavior of the seal becomes unstable.

Copyright © 2006 by American Society of Mechanical Engineers
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References

Figures

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Figure 1

Geometry of the model

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Figure 2

Mass flow rate ṁ (first mass flow), ṁ2 (second mass flow), and the differences between mass flow versus Mach number

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Figure 3

Density for the nitrogen at different temperature versus the pressure

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Figure 4

Dynamic viscosity for the nitrogen at different temperatures versus the pressure

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Figure 5

Algorithm of the program

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Figure 6

Comparison between analytical and numerical results

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Figure 7

Comparison between experimental and numerical results

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Figure 8

Comparison of the three models for Po=1MPa

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Figure 9

Comparison of the three models for Po=20MPa

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Figure 10

Temperature field obtained with the perfect gas law

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Figure 11

Temperature field obtained with the van der Waals law

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Figure 12

Dimensionless exit pressure for various outer pressures

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Figure 13

Dimensionless load capacity for various outer pressures

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Figure 14

Dimensionless mass flow for various outer pressures

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Figure 15

Dimensionless load capacity for various inner radii

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Figure 16

Dimensionless mass flow for various inner radii

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Figure 17

Dimensionless exit pressure for various inner radii

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