Combined experimental and multiphase computational fluid dynamics analysis of surface textured journal bearings in mixed regime of lubrication
journal contributionposted on 05.02.2018, 16:30 by Nick Morris, Hamed Shahmohamadi, Ramin Rahmani, Homer Rahnejat, Colin Garner
This paper investigates the effect of surface texturing in a partial pad journal bearing through a series of controlled experiments at operating conditions, promoting mixed or boundary regimes of lubrication. Improvements to load carrying capacity are observed under certain operating conditions. A comprehensive computational finite volume multiphase fluid dynamics analysis, including vapour transport equation and modified finite-size cavity Rayleigh-Plesset model, is used to study the effect of indented surface textures in the microscale contact domain and within the individual textures themselves. The results show improved conditions with a textured journal through promotion of micro-hydrodynamic effect, delaying the effect of lubricant rupture, thus extending the effective load bearing region. A very good agreement is obtained between measurements and predictions.
The authors would like to express their gratitude to the financial support provided by Lloyd's Register Foundation (LRF), which is extended through the International Institute for Cavitation Research (ICR: http://www.cavitation-institute.org/) to this project. The authors would also like to acknowledge the UK Engineering and Physical Sciences Research Council (EPSRC) for the Encyclopaedic Program Grant (www.encycloapedic.org) as some of their research findings are used in this research.
- Mechanical, Electrical and Manufacturing Engineering