Mathematical Formulation and Analysis of Static and Dynamic Performance Characteristics of Lobed Fluid Film Bearing Operating with Nanolubricant using Variable Viscosity Approach
DOI:
https://doi.org/10.48047/qacrq234Keywords:
Journal Bearing, Hydrodynamic Lubrication, Nanolubricant, Lobe, Load Carrying Capacity, Friction Variable, Finite Difference Method, Sommerfeld Number.Abstract
The static and dynamic performance parameters of a three-lobe fluid film bearing operating with a TiO₂-based non-Newtonian lubricant are analyzed. The Krieger-Dougherty model is employed to calculate the viscosity of the nanolubricant at a fixed nanoparticle concentration dispersed in the base lubricant. The Reynolds equation is modified to incorporate the couple-stress effect, and the Finite Difference Method (FDM) is used to solve it to determine various performance parameters. For varying nanoparticle concentrations in the base lubricant, the direct and cross-coupled dynamic coefficients (stiffness and damping) are evaluated.
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References
S. C. Soni, R. Sinhasan, and D. V. Singh, “Performance characteristics of noncircular bearings in laminar and turbulent flow regimes,” ASLE Transactions, vol. 24, no. 1, pp. 29–41, 1981.
J. W. Lund and K. K. Thomson, “A calculation method and data for the dynamic coefficient of oil-lubricated journal bearings,” Proceedings of the ASME Design and Engineering. Conference, pp. 1–28, New York, NY, USA, 1978.
A. Singh and B. K. Gupta, “Static and dynamic properties of oil films in displaced centres elliptical bearings,” Proceedingsof the Institution of Mechanical Engineers, Part C: Journal ofMechanical Engineering Science, vol. 197, no. 3, pp. 159–165, 1983.
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