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Analyse de l'effet des surfaces texturées dans un film mince. Application aux joints d'étanchéités.

Abstract : The aim of this work is to adapt the thin film model with inertia forces for taking into account textured surfaces (hole pattern) in annular turbulent seal flows. A first analysis stemming from the numerical solution of Navier Stokes equations show that inertia forces induce new effects near the cavity : a drag effect due to the momentum exchange and an important turbulent shear stress inside the mixing layer at the top of the cavity. Simulations were validated by P.I.V. measurements performed on an original setup developed for the study. The new deduced friction laws were integrated in a code based on the thin film model equations. The rotor and the stator friction factors are calculated separately and include the variation of the film thickness. The drag effect is taken into account as a source term. Calculations show an improvement of the theoretical results for the direct stiffness, cross stiffness and direct damping coefficients, with an over evaluation for the last one.
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https://tel.archives-ouvertes.fr/tel-00012160
Contributor : Frédéric Billy <>
Submitted on : Wednesday, April 19, 2006 - 11:36:26 AM
Last modification on : Wednesday, March 20, 2019 - 2:14:10 PM
Long-term archiving on: : Saturday, April 3, 2010 - 10:19:53 PM

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  • HAL Id : tel-00012160, version 1

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Frédéric Billy. Analyse de l'effet des surfaces texturées dans un film mince. Application aux joints d'étanchéités.. Autre. Université de Poitiers, 2005. Français. ⟨tel-00012160⟩

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