A Thermodynamic Solution for the Static and Dynamic Characteristics of a Two-Lobe Journal Bearing

Authors: B. Chetti, W. A. Crosby

Abstract:

The work described in this paper is an investigation of the static and dynamic characteristics of two-lobe journal bearings taking into consideration the thermal effects. A thermo-hydrodynamic solution of a finite two-lobe journal bearing is performed by solving the generalized form Reynolds equation with the energy equation, taking into consideration viscosity variation across the film thickness. The static and dynamic characteristics were numerically obtained. The results are evaluated for different values of viscosity-temperature coefficient and Peclet number. The results show that considering the thermal effects in the solution of the two-lobe journal bearing has a marked on the study of its stability.

Keywords: Two-lobe bearing, thermal effect, static and dynamic characteristics.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1336068

References:

[1] O. Pinkus, " Analysis of Elliptical Bearings, ” ASME Trans., Vol. 78, pp.965,1956
[2] A. Kumar, R.Sinhasan and D.v.Singh, "Performance Characteristics of Two-lobe Hydrodynamic Journal Bearings,” J. Lubr. Technol., Vol. 102, pp.425, 1980.
[3] S. C. Soni, R. Sinhasan and D. V. Singh , " Performance Characteristics of Non-circular Bearings in Laminar and Turbulent Flow Regimes, ” ASLE. Trans., Vol. 24 No 1, pp.29-41, 1981.
[4] H. Hashimoto, S. Wada and H. Tsunada , "Performance Characteristics of Elliptical Journal Bearings in Turbulent Flow Regime” Bulletin of JSME, Vol. 27 No 232 , pp.2265, 1984.
[5] S. C. Soni, R. Sinhasan and D. V. Singh, "Nonlinear analysis of Two-lobe Bearings in Turbulent Flow Regimes,” Wear, Vol. 103, pp.11-27, 1985.
[6] N. Abdul-Wahed, D. Nicolas and M. T. Pascal, "Stability and Unbalance Response of Large Turbine Bearings” J. Lubr. Technol ASME. Trans, Vol. 104, pp.66-75, 1982.
[7] A. Singh and B. K. Gupta, "Stability Limits of Elliptical Journal Bearings Supporting Flexible Rotors” Wear, Vol. 77, pp. 159-170, 1982.
[8] H. N. Chandrawat and R. Sinhasan, "A study of a Two-lobe Journal Bearing Considering Elastohydrodynamic effects” Wear, Vol. 127, pp.161-177, 1988.
[9] D. V. Singh, R. Sinhasan and K. Prabhkaran Nair, "Elastohydrodynamic Effects in Elliptical Bearings” Tribology International, Vol. 22 No 1, pp.43, 1989.
[10] S. P. Tayal, R. Sinhasan and D. V. Singh, "Finite Element Analysis of Elliptical Bearing Lubricated by Non-Newtonian Fluid” Wear, Vol. 80, pp.71-81, 1982.
[11] D. Dowson and C. N. March, "The Thermo-hydrodynamic analysis of Journal Bearings” Pro. Inst. Mech. Eng London, Vol. 181 No 30, pp.117-126, 1966.
[12] A. Seireg and H. Ezzet, "Thermohydrodynamic Phenomena in Fluid Film Lubrication” J. Lubr. Technol ASME. Trans., pp.187-194, 1973.
[13] H. McCallion, F. Youcif and T. Lloyd, "The Analysis of Thermal Effects in a Full Journal Bearing” J. Lubr. Technol ASME. Trans., pp.578-587, 1976.
[14] T. Suganani and A. Z. Szeri, "A Thermohydrodynamic Analysis of Journal Bearings” J. Lubr. Technol ASME.Trans., Vol. 101, pp.21-27, 1979.
[15] R. Boncompain, M. Fillon and J. Frene, "Analysis of Thermal effects in hydrodynamic Bearings” J. Tribol ASME. Trans., Vol. 108, pp.219-224, 1986.
[16] S. Basri and D. T. Gethin, "A Comparative Study of the Thermal Behavior of Profile Bore Bearings” Tribology International, Vol. 23 No 4, pp.265-276, 1990.
[17] W. A. Crosby, "A Thermohydrodynamic Solution of the Two-lobe Bearing Considering Reverse Flow at the Leading and Trailing Edges, ” Wear, Vol. 143 , pp.159-173, 1991 .
[18] A. Hussain, K. Mistry and S. Biswas, "Thermal Analysis of Non-circular Bearing” J. Tribol ASME.Trans., Vol. 118, pp. 246-254, 1996.
[19] B. Chetti, "A static and dynamic characteristics of three-lobe bearing including the thermal effects” Proceedings of the International Conference on Modeling and Simulation (MS’07), Algeria, pp.1-6, 2007.
[20] A. Chauhan, R. Sehgal and R. K. Sharma, "Investigation on the thermal effects in non-circular journal bearings” Tribology International Vol. 44, pp. 1765-1773, 2011.