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http://dx.doi.org/10.9725/kstle.2012.28.2.081

The Performance Comparison between the Mixture of Each Liquid to be Blended and Multi-grade Engine Oil as a Single Fluid in a High Speed Thermo-hydrodynamic Journal Bearing  

Chun, Sang-Myung (Dept. of Automotive Engineering, Hoseo University)
Publication Information
Tribology and Lubricants / v.28, no.2, 2012 , pp. 81-92 More about this Journal
Abstract
To product multi-grade oil like engine oil, a sort of mineral base oil is mixed with a fundamental additive liquid package and a polymer liquid as viscosity index improver in order to improve the lubricating property of oil. That is, engine oil is the mixture of more than two fluids. In this paper, it will be systematically organized the governing equation describing non-Newtonian thermo-hydrodynamic lubrication related with the mixture of incompressible fluids based on the principle of continuum mechanics. Then, in order to find how the thermal analysis effect on the bearing performance lubricated with the mixture of multi-fluids, it will be compared to the performances between the mixture of each liquid to be blended and multi-grade engine oil as a single fluid in a high speed journal bearing. It is found that, in the case of lower viscosity oil, the difference of pressure distribution between the above two cases turns out to be existed, even if the load capacity is same level.
Keywords
mixture of fluids; homogenous liquid; mineral base oil; additive liquid package; polymer liquid for viscosity index improver; multi-grade engine oil; non-newtonian fluid; high speedjournal bearing; thermo-hydrodynamic lubrication;
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Times Cited By KSCI : 2  (Citation Analysis)
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1 Dai, F. and Khonsari, M. M., "A Theory of Hydrodynamic Lubrication Involving the Mixture of Two Fluids," Trans. of the ASME, Journal of Applied Mechanics, Vol. 61, pp. 634-641, 1994.   DOI
2 Boncompain, R., Fillon, M. and Frene, J., "Analysis of Thermal Effects in Hydrodynamic Bearings," Trans. of the ASME, Journal of Tribology, Vol. 108, 1986, pp. 219-224.   DOI
3 Dien, I. K. and Elrod, H. G., "A Generalized Steady- State Reynolds Equation for non-Newtonian Fluids, with Application to Journal Bearings," J. Lubrication Technology, Vol. 105, pp. 385-390, 1983.   DOI
4 Nayfeh, A. H., Perturbation Methods, John Wiley & Sons, Inc., New York, 1973.
5 Paranjpe, R. S., "Analysis of Non-Newtonian Effects in Dynamically Loaded Finite Journal Bearings Including Mass Conserving Cavitation," Trans. of the ASME, Journal of Tribology, Vol. 114, pp. 736-744, 1992.   DOI
6 Chun, S. M., "Thermohydrodyanmic Lubrication Analysis of Journal Bearing on Steam Turbine Shipping Engine Involving the Mixture of Water within Turbine Oil," Journal of KSTLE, Vol. 27, No. 2, pp.77- 87, 2011.   과학기술학회마을   DOI
7 Chun, S. M., "Study on Bearing Performance Involving the Mixture of Water within Engine Oil in a Turbocharger Journal Bearing," Journal of KSTLE, Vol. 27, No. 4, pp. 183-192, 2011.   과학기술학회마을   DOI
8 Taylor, C. M., "Turbulent Lubrication Theory Applied to Fluid Film Bearing Design," Proc. Inst. Mech. Engrs., Vol. 184, Part 3L, pp. 40-47, 1969-1970.
9 Constantinescu, V. N., "Basic Relationships in Turbulent Lubrication and Their Extension to Include Thermal Effects," Trans. of the ASME, J. of Lubrication Technology, Vol. 95, pp. 147-154, 1973.   DOI
10 Safar, Z. and Szeri, A. Z., "Thermohydrodynamic Lubrication in Laminar and Turbulent Regimes," Trans. of the ASME, J. of Lubrication Technology, Vol. 96, pp. 48-57, 1974.   DOI
11 Chun, S. M. and Lalas, D. P., "Parametric Study of Inlet Oil Temperature and Pressure for a Half-Circumferential Grooved Journal Bearing," STLE Tribology Transaction, Vol. 35, no. 2, pp. 213-224, 1992.   DOI
12 Chun, S. M., "Aeration Effects on the Performance of a Turbocharger Journal Bearing," Tribology International, Vol. 41, pp. 296-306, 2008.   DOI
13 Chen, Chun I., Typical Lubricating Oil Properties (Chapter 1), Tribology Data Hand Book, Edited by E. Richard Booser, CRC Press LLC, pp. 28-29, 1997
14 Chun, S. M., "A Parametric Study on bubble lubrication of High-Speed Journal Bearings," Tribology International, Vol. 35, No. 1, pp. 1-13, 2002.   DOI
15 Gazley, C. Jr., "Heat-Transfer Characteristics of the Rotational and Axial flow Between Concentric Cylinders," Trans. Of the ASME, Vol. 80, Jan. 1958, pp. 79-90.
16 Chun, S. M., "Study on Mixing Flow Effects in a High-Speed Journal Bearing," Tribology International, vol. 34, no. 6, pp. 397-405, 2001.   DOI
17 Michael M. Khonsari and E. Richard Booser, Applied Tribology-Bearing Design and Lubrication, 2nd Edition, John Wiley & Sons Ltd., West Sussex, England, p. 216, 2008.