Elasto-Hydrodynamic lubrication analysis of partial arc bearings using CFD & FSI.

Bhat, Praveen and Shenoy, Satish B and Pai, Raghuvir B (2007) Elasto-Hydrodynamic lubrication analysis of partial arc bearings using CFD & FSI. Technologiâ Inovativâ, Revista Constructia de Masini, 53 (4). pp. 109-112. ISSN 0573-7419 (Submitted)

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Abstract

For the theoretical calculations of the pressure distribution and, in turn, of the performance characteristics of the partial arc bearing system, it is necessary to know accurately the fluid film geometry. Since, in practice, the runner and the bearing shell are elastic and deform under hydrodynamic pressure, the correct film geometry cannot be established without taking into account elastic deformations. The journal material is more rigid than the bearing shell material, so the deformation of the journal surface can be neglected. In the present analysis, the modified film geometry is obtained by including the deformation in the bearing and its effect on the performance characteristics of a partial arc bearing is studied. This paper presents the overall Elasto-hydrodynamic Lubrication(EHL) analysis of an Externally adjustable Single 60º partial arc bearing with different tilts and different radial adjustments using the sequential application of Computational Fluid Dynamics(CFD) and Computational Structural Dynamics(CSD). Here the coupled field analysis uses the capabilities of commercially available Finite Element Software ANSYS/FLOTRAN and the technique of Fluid Structure Interaction (FSI). The pressure field has been obtained considering the laminar flow regime using CFD. Stress distribution and deformation in the pad due to resulting pressure force is obtained using FEM, satisfying the boundary conditions. The stress distribution indicates the critical points in the pad. ANSYS/FLOTRAN is applied to simulate the pressure field and calculate the static characteristics of a Single 60º partial arc bearing for various eccentricity ratios and length to diameter (L/D) ratios. The results show reasonable agreement in general.

Item Type: Article
Uncontrolled Keywords: Partial arc bearing, FSI, CFD
Subjects: Engineering > MIT Manipal > Mechanical and Manufacturing
Depositing User: MIT Library
Date Deposited: 09 Feb 2012 09:11
Last Modified: 09 Feb 2012 09:11
URI: http://eprints.manipal.edu/id/eprint/3072

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