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Dynamic performance characteristics of finite journal bearings operating on TiO2 based nanolubricants
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نویسنده
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binu k.g. ,yathish k. ,shenoy b.s. ,rao d.s. ,pai r.
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منبع
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pertanika journal of science and technology - 2017 - دوره : 25 - شماره : 3 - صفحه:963 -976
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چکیده
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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. © 2017 universiti putra malaysia press.
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کلیدواژه
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Couple Stress Fluids; Dynamic Characteristics; Journal bearings; Nanofluids; TiO2 nanoparticle additives; Viscosity model
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آدرس
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department of mechanical engineering,st joseph engineering college,vamanjoor,mangaluru,karnataka, India, department of mechanical engineering,st joseph engineering college,vamanjoor,mangaluru,karnataka, India, department of aeronautical,manipal institute of technology,manipal,karnataka, India, department of mechanical engineering,manipal institute of technology,manipal,karnataka, India, department of mechanical engineering,manipal institute of technology,manipal,karnataka, India
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Authors
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