Two-scale homogenization of hydrodynamic lubrication in a mechanical seal with isotropic roughness based on the Elrod cavitation algorithm
| Autor: | Yanxiang Han, Qingen Meng, Gregory de Boer |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Scale (ratio) Computer simulation Mechanical Engineering Isotropy Fluid bearing 02 engineering and technology Surfaces and Interfaces Mechanics Surface finish 021001 nanoscience & nanotechnology Homogenization (chemistry) Seal (mechanical) Surfaces Coatings and Films 020303 mechanical engineering & transports 0203 mechanical engineering Cavitation 0210 nano-technology |
| Zdroj: | Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology. 236:359-385 |
| ISSN: | 2041-305X 1350-6501 |
| DOI: | 10.1177/13506501211017673 |
| Popis: | A two-scale homogenization method for modelling the hydrodynamic lubrication of mechanical seals with isotropic roughness was developed and presented the influence of surface topography coupled into the lubricating domain. A linearization approach was derived to link the effects of surface topography across disparate scales. Solutions were calculated in a polar coordinate system derived based on the Elrod cavitation algorithm and were determined using homogenization of periodic simulations describing the lubrication of a series of surface topographical features. Solutions obtained for the hydrodynamic lubrication regime showed that the two-scale homogenization approach agreed well with lubrication theory in the case without topography. Varying topography amplitude demonstrated that the presence of surface topography improved tribological performance for a mechanical seal in terms of increasing load-carrying capacity and reducing friction coefficient in the radial direction. A Stribeck curve analysis was conducted, which indicated that including surface topography led to an increase in load-carrying capacity and a reduction in friction. A study of macro-scale surface waviness showed that the micro-scale variations observed were smaller in magnitude but cannot be obtained without the two-scale method and cause significant changes in the tribological performance. |
| Databáze: | OpenAIRE |
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