Influence of pressure on dynamic viscosity of oil

• Autorzy: Czaban A. , Frycz M.
• Języki publikacji: EN

Abstrakty

EN

The viscosity of lubricant is physical quantity, which has major impact on slide bearings and micro-bearings functioning parameters. Applying computer simulations as a tool to study the hydrodynamic lubrication phenomenon, researcher should create a computational model as close as possible to the real object, therefore the knowledge about a viscosity dependence on temperature and shear rate of bearing lubricating oil is essential in simulations of slide bearings hydrodynamic lubrication. This paper present research, which show, that also an influence of pressure on oil dynamic viscosity should be taken into consideration. The aim of this work is to determine the influence of pressure on the dynamic viscosity of lubricating oil. In this research the selected new and used engine oils were investigated. The dynamic viscosity of oil was measured at different pressures and temperatures in the function of shear rate. In this work the engine oils of passenger vehicles were investigated. The viscosity measurements for new and used lubricating oils were made with the Thermo Scientific Haake Mars III rheometer. The received information will be used in the simulations of hydrodynamic lubrication of slide bearings and microbearings. Fitting viscosity curves, described by a viscosity model adopted in simulations, to the experimental data, obtained for motor oils, will allow to find the values of coefficients of that model. The determined coefficients will be set in the relationship defined by the adopted viscosity model, implemented in the used for simulations CFD software. Collected data may also be useful for designing bearings and sliding friction pairs.

Słowa kluczowe

EN

dynamic viscosity; engine oil; pressure dependence; temperature dependence; shear rate

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2013
• Tom: Vol. 20, No. 2
• Strony: 49--54
• Opis fizyczny: Bibliogr. 7 poz., rys.

Twórcy

autor

Czaban A.

• Gdynia Maritime University, Faculty of Marine Engineering Morska Street 81-87, 81-225 Gdynia, Poland tel.:[phone], fax: [phone]

autor

Frycz M.

• Gdynia Maritime University, Faculty of Marine Engineering Morska Street 81-87, 81-225 Gdynia, Poland tel.:[phone], fax: [phone]

Bibliografia

• [1] Czaban, A., The Influence of Temperature and Shear Rate on the Viscosity of Selected Motor Oils, Solid State Phenomena, Vol. 199, pp. 188-193, 2013.
• [2] Frycz, M., Effect of Concentration of Magnetic Particles on Ferrooil’s Dynamic Viscosity as a Function of Temperature and Shear Rate, Journal of KONES. Powertrain and Transport, Vol. 19, No.2, pp. 159-165, 2012.
• [3] Frycz, M., Effect of Temperature and Deformation Rate on the Dynamic Viscosity of Ferrofluid, Solid State Phenomena, Vol. 199, pp. 137-142, 2013.
• [4] Miszczak, A., Analiza hydrodynamicznego smarowania ferrociecz􀄅 poprzecznych 􀃡o􀄪ysk 􀄞lizgowych, Fundacja Rozwoju Akademii Morskiej, Gdynia 2006.
• [5] Sikora, G., Miszczak, A., The Influence of Oil Ageing on the Change of Viscosity and Lubricity of Engine Oil, Solid State Phenomena, Vol. 199, pp. 182-187, 2013.
• [6] Szeri, A. Z., Fluid film lubrication. Theory & Design, Cambridge University Press, Cambridge 1998.
• [7] Wierzcholski, K., The Influence of the force of inertia and variable oil viscosity on the pressure distributions in a journal bearing of finite length, Wear, 45, pp. 1-16, 1977.