Investigation of Different Piston Ring Curvatures on Lubricant Transport along Cylinder Liner in Large Two-Stroke Marine Diesel Engines

Hannibal Christian Overgaard, Peder Klit, Anders Vølund

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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 Reynold’s 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 before mentioned parameters have been investigated numerically. The numerical results are presented and discussed.
Original languageEnglish
Title of host publicationProceedings of The 17th Nordic Symposium on Tribology.
Number of pages9
Publication date2016
Publication statusPublished - 2016
EventThe 17th Nordic Symposium on Tribology - Aulanko, Hämeenlinna, Finland
Duration: 14 Jun 201617 Jun 2016


ConferenceThe 17th Nordic Symposium on Tribology

Bibliographical note

This project has received funding from the European Union's Horizon 2020 research and innovation program under grant agreement No 634135.


  • Lubricant transport
  • Reynold’s equation
  • Piston ring lubrication
  • Finite difference method
  • Perturbation of Reynold’s equation
  • Hydrodynamic lubrication
  • Flow continuity
  • Lubricant starvation
  • The 17th Nordic Symposium on Tribology

    Hannibal Toxværd Overgaard (Participant)

    14 Jun 201617 Jun 2016

    Activity: Attending an eventParticipating in or organising workshops, courses, seminars etc.

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