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Characteristics of Symmetric Hybrid Worn Slot-Entry Journal Bearing under Turbulent Regime

Nathi Ram 1 and Saurabh Kumar Yadav 2
1. Department of Mechanical and Automation Engineering, Indira Gandhi Delhi Technical University for Women (IGDTUW), Kashmere Gate, Delhi 110006, India
2. Department of Mechanical Engineering, Institute of Infrastructure Technology Research and Management, Ahmedabad, Gujarat, India

Abstract—In the present work, computations of performance of symmetric hybrid worn slot-entry journal bearing under turbulent lubrication have been investigated. The model of abrasive wear given by Dufrane has been used to determine the wear on the surface of bearing because of starting and stopping operations. For wear and turbulent lubrication, the Reynolds equation has been modified using Constantinescu turbulent model. This modified equation has been solved by applying the finite element method. The effects of wear and turbulent lubrication on the characteristics of bearing have been evaluated for different Reynolds number and wear depth parameter. Minimum thickness of the fluid film and damping coefficients are more for the unworn bearing having slot width ratio (SWR) of 0.25 than the bearing with SWR of 0.5 and 0.75 operates at a constant value of Reynolds number but these values reduce for bearings as wear depth parameter increases. Further, it is also observed that as wear depth parameter value increases, stability threshold speed gets reduced for bearing operates at slot width ratio 0.25, 0.5 and 0.75 for constant Reynolds number.

Index Terms—Hydrostatic journal bearing, turbulence, wear, finite element method

Cite: Nathi Ram and Saurabh Kumar Yadav, "Characteristics of Symmetric Hybrid Worn Slot-Entry Journal Bearing under Turbulent Regime" International Journal of Mechanical Engineering and Robotics Research, Vol. 9, No. 3, pp. 459-463, March 2020. DOI: 10.18178/ijmerr.9.3.459-463

Copyright © 2020 by the authors. This is an open access article distributed under the Creative Commons Attribution License (CC BY-NC-ND 4.0), which permits use, distribution and reproduction in any medium, provided that the article is properly cited, the use is non-commercial and no modifications or adaptations are made.