Change search
ReferencesLink to record
Permanent link

Direct link
Modeling of Combustion Engine Bearing Lubrication
2013 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

This work represents an effort to achieve greater understanding on the lubrication of engine journal bearings and develop a model which can be used in future work for the optimization of load carrying capacity and minimization of frictional power loss.In a first step a model is presented which include dynamic loading, cavitation, non-Newtonian lubrication and groove geometry. The model is incorporated in a commercial multiphysics software (COMSOL). Cavitation and non-Newtonian lubrication are complex phenomena which require model simplifications. Cavitation model simplification has been chosen after evaluation of solutions found in literature while a new model one has been proposed for non-Newtonian lubrication.The simulation model for journal bearings has then been used to analyze bearing performance under geometrical and oil parameters variation. Main results include that typical oil definition with viscosity values at high and low shear rates is insufficient and that higher eccentricity in operating conditions helps bearing stability against perturbations.

Place, publisher, year, edition, pages
2013. , 88 p.
Keyword [en]
Technology, Journal bearing, Reynolds equation, Cavitation, Non-newtonian, Dynamic
Keyword [sv]
URN: urn:nbn:se:ltu:diva-57017Local ID: dba8de29-fe06-4012-b675-489ff9db490cOAI: diva2:1030404
Subject / course
Student thesis, at least 30 credits
Educational program
Mechanical Engineering, master's level
Validerat; 20130626 (global_studentproject_submitter)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

Open Access in DiVA

fulltext(2434 kB)0 downloads
File information
File name FULLTEXT02.pdfFile size 2434 kBChecksum SHA-512
Type fulltextMimetype application/pdf

Search in DiVA

By author/editor
Pérez Ràfols, Francesc

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

ReferencesLink to record
Permanent link

Direct link