Investigation of different piston ring curvatures on lubricant transport along cylinder liner in large two-stroke marine diesel engines

H Overgaard*, P Klit, A Vølund

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

A theoretical investigation of the hydrodynamic lubrication of the top compression piston ring in a large two-stroke marine diesel engine is presented. The groove mounted piston ring is driven by the reciprocal motion of the piston. The ring shape follows a circular geometry and the effect of changes in radii is analysed. A numerical model based on the finite difference method in 1D has been developed for solving Reynolds equation in combination with the load equilibrium equation together with flow continuity between the piston ring surface and liner for analysis of the lubricant transport. The cyclic variation throughout one stroke is presented for the minimum film thicknesses at different interesting locations of the piston ring surface together with the friction and the pressure distribution history. The aforementioned parameters have been investigated numerically. The numerical results are presented and discussed.
Original languageEnglish
JournalProceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology
Volume232
Issue number1
Pages (from-to)85-93
ISSN1350-6501
DOIs
Publication statusPublished - 2018

Keywords

  • Lubricant transport
  • Piston ring lubrication
  • Perturbation of Reynolds equation
  • Flow continuity
  • Lubricant starvation

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