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Dynamic Performance Characteristics of Finite Journal Bearings Operating on TiO2 based Nanolubricants

Binu, K G and Yathish, K and Shenoy, Satish B and Rao, Srikanth D and Pai, Raghuvir B (2017) Dynamic Performance Characteristics of Finite Journal Bearings Operating on TiO2 based Nanolubricants. Pertanika Journal of Tropical Agricultural Science, 25 (3). pp. 973-986. ISSN 1511-3701

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Abstract

Dynamic stiffness and damping coefficients of a finite journal bearing operating on TiO2 based nanolubricant are obtained using the linear perturbation approach. Time dependent version of governing Reynolds equation is modified to consider the couple stress effect of TiO2 nanoparticle lubricant additives. The viscosity variation of lubricant with varying concentrations of nanoparticle additives is simulated using a modified Krieger-Dougherty model. The modified Reynolds equation is solved using linear perturbation approach to obtain the dynamic pressures and dynamic coefficients. Threshold stability maps are plotted depicting stable operating regions of journal bearing operating on TiO2 nanolubricants. Results reveal an increase in stiffness and damping coefficients, and a corresponding improvement in whirl instability characteristics of journal bearings, with increase in TiO2 nanoparticle concentration.

Item Type: Article
Uncontrolled Keywords: Couple Stress Fluids, Dynamic Characteristics, Journal bearings, Nanofluids, TiO2 nanoparticle additives, Viscosity model
Subjects: Engineering > MIT Manipal > Aeronautical and Automobile
Engineering > MIT Manipal > Mechanical and Manufacturing
Depositing User: MIT Library
Date Deposited: 23 Jun 2017 08:45
Last Modified: 23 Jun 2017 08:45
URI: http://eprints.manipal.edu/id/eprint/149142

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