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Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/32191

Title: An investigation into the oil transport and starvation of piston-ring pack
Authors: Bewsher, S.R.
Mohammadpour, Mahdi
Rahnejat, Homer
Offner, Gunter
Knaus, O.
Keywords: Piston ring-pack
Inlet starvation
Zero-reverse flow inlet boundary
Mixed- hydrodynamics
Friction
Issue Date: 2018
Publisher: © The authors. Published by SAGE Publications Ltd
Citation: BEWSHER, S.R. ...et al., 2018. An investigation into the oil transport and starvation of piston-ring pack. Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, doi:10.1177/1350650118768310.
Abstract: In order to accurately predict the lubricant film thickness and generated friction in any tribological contact, it is important to determine appropriate boundary conditions, taking into account the oil availability and extent of starvation. This paper presents a two-dimensional hydrodynamic model of a piston ring pack for prediction of lubricant film thickness, friction and total power loss. The model takes into account starvation caused by reverse flow at the conjunctional inlet wedge, and applied to a ring-pack, comprising a compression and scraper ring. Inlet boundaries are calculated for an engine cycle of a 4-cylinder, 4-stroke gasoline engine operating at 1500rpm with conditions pertaining to the New European Drive Cycle (NEDC). The analysis shows that the two main sources of starvation; firstly due to a physical lack of inlet meniscus and secondly due to reverse flow at the inlet wedge, significantly affect the prevailing conditions from the generally assumed idealised boundary conditions. Such an approach has not hitherto been reported in literature.
Description: This paper was published in the journal Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology and the definitive published version is available at https://doi.org/10.1177/1350650118768310.
Sponsor: The authors would like to express their gratitude to the Engineering and Physical Sciences Research Council (EPSRC) and AVL List for the financial and technical support extended to this research.
Version: Accepted for publication
DOI: 10.1177/1350650118768310
URI: https://dspace.lboro.ac.uk/2134/32191
Publisher Link: https://doi.org/10.1177/1350650118768310
ISSN: 2041-305X
Appears in Collections:Published Articles (Mechanical, Electrical and Manufacturing Engineering)

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