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Títol:
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Modeling of combustion engine bearing lubrication
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Autor/a:
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Pérez Ráfols, Francisco
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Altres autors:
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Larsson, Roland |
Abstract:
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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. |
Abstract:
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Outgoing |
Matèries:
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-Àrees temàtiques de la UPC::Enginyeria mecànica::Motors::Motors de combustió interna -Internal combustion engines -- Bearings -Lubrication and lubricants -- Computer simulation -Motors de combustió interna -- Coixinets -Lubrificació i lubrificants -- Simulació per ordinador |
Drets:
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Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/ |
Tipus de document:
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Projecte/Treball fi de carrera o de grau |
Publicat per:
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Universitat Politècnica de Catalunya; Luleå University of Technology
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