Boundary Conditions for Reynolds Equation with Particular Reference to Piston Ring Lubrication

Priest, Martin; Taylor, R. I.; Dowson, D.; Taylor, C. M.

doi:10.1016/s0167-8922(08)70806-x

Cited by 17 publications

(12 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…I had the good fortune to co-author a paper with professor Dowson around this time on the topic of the different cavitation boundary conditions that can be used for piston ring lubrication. 46 Soon after, a useful collaboration started between Shell and Leeds University on the general topic of piston lubrication and engine friction, in the late 1990s and went on until around 2013, and there was regular contact with the Leeds University tribology team (including professor Dowson) and the Shell scientists. At the time of this work, professor Dowson had retired, and was an Emeritus Professor and so no longer had a day-to-day role in the projects but was still very encouraging behind the scenes and was interested to hear and read about the research results.…”

Section: Jost Reportmentioning

confidence: 99%

Duncan Dowson’s impact on industrial tribology

Taylor

2021

Proceedings of the Institution of Mechanical Engineers, Part J:

View full text Add to dashboard Cite

Professor Duncan Dowson had close connections with industry throughout his academic career, and viewed industrial tribological challenges as problems to be solved and as a source of new ideas. Professor Dowson’s famous work on a numerical solution for the lubrication of an elastohydrodynamic line contact, with professor Higginson, was motivated by the need to better understand gear lubrication. These first calculations took 18 months to complete(!), and simpler correlation functions fitted to numerical simulations were developed to enable tribologists in academia and industry to apply elastohydrodynamic lubrication theory without the need for full scale models. Industrial partners such as Shell supplied high-pressure fluid properties required for the elastohydrodynamic calculations (such as the pressure coefficient of viscosity and the way in which lubricant density varies with pressure). Professor Dowson also famously served on the Jost Committee, which quantified, for the first time, the financial impact of tribology, and highlighted that investments in good tribological practices would pay for themselves many times over. It should be remembered that in setting up the Jost Committee, the UK Government specifically asked the committee ‘ to investigate the state of lubrication education and research and to establish the requirements of industry in this regard’. Personal memories of the significant collaborations that I was involved with, as an industrial research scientist, with Leeds University from the mid-1990s to around 2013, which predominantly focused on piston ring tribology are also included as is a brief discussion of the Leeds-Lyon Symposia on Tribology.

show abstract

Section: Jost Reportmentioning

confidence: 99%

Duncan Dowson’s impact on industrial tribology

Taylor

2021

Proceedings of the Institution of Mechanical Engineers, Part J:

View full text Add to dashboard Cite

show abstract

“…Priest et al. 76 applied the model for piston ring-pack developed in Dowson et al. 67 to examine the analysis sensitivity to alternative boundary conditions.…”

Section: Lubrication Mechanismsmentioning

confidence: 99%

“…Priest et al 76 applied the model for piston ringpack developed in Dowson et al 67 to examine the analysis sensitivity to alternative boundary conditions. The effect of Reynolds cavitation, reformation boundary conditions, and modified Reynolds separation boundary conditions were examined and compared to experimental results.…”

Section: Boundary and Mixed Lubricationmentioning

confidence: 99%

Piston ring–liner lubrication and tribological performance evaluation: A review

Delprete

Razavykia

2017

Proceedings of the Institution of Mechanical Engineers, Part J:

View full text Add to dashboard Cite

Internal combustion engines are at present used as the major power sources for transportation and power generator. Improvement of the internal combustion engine efficiency is expected due to strict environmental standards and energy costs. Any reduction in oil consumption, friction power losses and emissions results in improving engines’ performance and durability. Automotive industries have intense passion to increase engines’ efficiency to meet the fuel economy and emission standards. Many studies have been conducted to develop reliable approaches and models to understand the lubrication mechanisms and calculate power losses. This review paper summarizes the synthesis of the main technical aspects considered during modeling of piston ring–liner lubrication and friction losses investigations. The literature review highlights the effects of piston ring dynamics, components geometry, lubricant rheology, surface topography and adopted approaches, on frictional losses contributed by the piston ring-pack.

show abstract

“…The Priest et al 25 model resulted in significant negative hydrodynamic pressures, which suggests calculations using the Coyne and Elrod separation. Han and Lee 26 also pointed out the necessity to reconstruct new boundary conditions for modelling results, as experimental results showed that the entire surface of the ring was not enveloped in the oil film.…”

Section: Introductionmentioning

confidence: 95%

A parametric study on oil film pressure measurements in a single piston-ring configuration

Dellis¹,

Arcoumanis

2012

International Journal of Engine Research

View full text Add to dashboard Cite

Oil film pressure, the driving force behind piston-ring lubrication phenomena, is measured in a single piston-ring simulating rig after the successful installation of a miniature pressure transducer. The partition of overall load-carrying capacity between direct surface interaction and hydrodynamic action is clearly of some significance if the characteristics of the piston seal are to be understood and predicted with any confidence. It is therefore important that the contribution of the fluid film lubrication to load support be adequately represented. This study presents an extensive load, speed, temperature and piston-ring curvature parametric study on how the measured pressure profile at mid-stroke is affected in terms of peak pressure, magnitude and shift in the trailing edge of the piston ring, taking into account cavitation appearance and lubricant viscosity variation.

show abstract

Boundary Conditions for Reynolds Equation with Particular Reference to Piston Ring Lubrication

Cited by 17 publications

References 20 publications

Duncan Dowson’s impact on industrial tribology

Duncan Dowson’s impact on industrial tribology

Piston ring–liner lubrication and tribological performance evaluation: A review

A parametric study on oil film pressure measurements in a single piston-ring configuration

Contact Info

Product

Resources

About