| Abstrakt: |
A numerical approach is presented to simulate the combined effect of pressure, temperature, roughness and cavitation in the hydrodynamic plain journal bearing. The oil film temperature within the bearing increases because of shearing action. Consequently, the viscosity of lubricant reduces and hence the load capacity of the bearing decreases. Therefore, thermoelastohydrodynamic analysis of journal bearing is essential for better estimation of bearing performance. Finite difference method (FDM) is used to discretise the governing equations. Elastic deformation is obtained by influence coefficient method. Influence coefficient matrix is calculated through finite element method. Further, hydrodynamic pressure is determined by solving the three equations, namely Reynold’s equation, film thickness equation and energy equation, which are solved through FDM. Effect of surface roughness on pressure, temperature, friction and oil flow is studied. Results are compared with the existing published work and are in good agreement with it. There is a marginal increase in bearing deformation value with increase in eccentricity ratio up to 0.8, and there after a sharp rise is noticed for further higher eccentricity. |
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