Dynamic performance characteristics of finite journal bearings operating on TiO2 based nanolubricants

K. G. Binu; K. Yathish; B. S. Shenoy; D. S. Rao; R. Pai

Dynamic performance characteristics of finite journal bearings operating on TiO₂ based nanolubricants

K. G. Binu, K. Yathish, B. S. Shenoy, D. S. Rao, R. Pai

Research output: Contribution to journal › Article › peer-review

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.

Original language	English
Pages (from-to)	963-976
Number of pages	14
Journal	Pertanika Journal of Science and Technology
Volume	25
Issue number	3
Publication status	Published - 01-07-2017

All Science Journal Classification (ASJC) codes

Computer Science(all)
Chemical Engineering(all)
Environmental Science(all)
Agricultural and Biological Sciences(all)

Cite this

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title = "Dynamic performance characteristics of finite journal bearings operating on TiO2 based nanolubricants",

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.",

author = "Binu, {K. G.} and K. Yathish and Shenoy, {B. S.} and Rao, {D. S.} and R. Pai",

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T1 - Dynamic performance characteristics of finite journal bearings operating on TiO2 based nanolubricants

AU - Binu, K. G.

AU - Yathish, K.

AU - Shenoy, B. S.

AU - Rao, D. S.

AU - Pai, R.

PY - 2017/7/1

Y1 - 2017/7/1

N2 - 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.

AB - 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.

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Dynamic performance characteristics of finite journal bearings operating on TiO₂ based nanolubricants

Abstract

All Science Journal Classification (ASJC) codes

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