Analysis of hydrodynamic journal bearings lubricated with non-Newtonian fluids |
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| Authors: | P.D. Williams G.R. Symmons |
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| Affiliation: | 1. Department of Mechanical and Production Engineering, Sheffield City Polytechnic, Sheffield, UK;1. School of Mechanical Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China;2. Luoyang Bearing Research Institute Co., Ltd., Luoyang 471000, China;3. Shanxi Electronic Science and Technology Institute, Linfen 041000, China;1. Department of Mechanical Engineering, Virginia Tech, Blacksburg, VA 24061, United States;2. Department of Mechanical Engineering, University of Utah, Salt Lake City, UT 84112, United States;1. Hubei Key Laboratory of Advanced Technology of Automotive Parts, Wuhan 430070, China;2. School of Automotive Engineering, Wuhan University of Technology, Wuhan 430070, China;1. Department of Structural and Mechanical Engineering. ETSIIT University of Cantabria, Avda. de los Castros s/n, 39005 Santander, Spain;2. School of Mechanical and Manufacturing Engineering, Loughborough University, Loughborough LE11 3TU, UK |
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| Abstract: | A procedure for solving the Navier-Stokes equations for the steady, three-dimensional flow of a non-Newtonian fluid within a finite-breadth hydrodynamic journal bearing is described. The method uses a finite-difference approach, together with a technique known as SIMPLE (Semi-Implicit Method for Pressure-Linked Equations) which has now become established in the field of computational fluid dynamics. The concept of ‘effective viscosity’ to describe the non-linear dependence of shear stress on shear rate is used to predict the performance of bearings having a single full-width axial inlet groove situated at the position of maximum film thickness. To illustrate the capabilities of the procedure, results are obtained for a range of non-linearity factors, and lead to the conclusion that the pressure distribution, attitude angle, end-leakage rate, shear force and load capacity can all be predicted for a variety of non-Newtonian lubricants using the SIMPLE numerical integration technique. |
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| Keywords: | hydrodynamic journal bearings non-Newtonian fluids lubrication computational fluid dynamics |
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