• Mohammed Rafi H Kerur
• Dr. T. Nagaraju
• M. S. Pradeep

The influence of surface roughness on performance characteristics of porous journal bearing is studied by considering thermal effect. The modified Reynolds equation governing the pressure field within fluid-film is developed using Patir and Cheng flow factors and Darcy equation to include the 3D surface roughness and thermal effects. The energy equations for both fluid-film and porous media are also derived. The modified Reynolds and energy equations are simultaneously solved using finite element method. The performance characteristics are obtained by using the matched pressure field that obtained from the simultaneous solution of Reynolds equation. The load carrying capacity, fluid-film stiffness, damping coefficients and stability threshold speed margin of smooth and rough porous journal bearings were shown to reduces as permeability of porous matrix increases. The reduced performance characteristics of porous journal bearing due to increased permeability were shown to be compensated by the proper roughness. Stationary roughness and transverse roughness pattern combination was shown to provide maximum enhancement for the circumferential and axial pressure distribution, load carrying capacity, fluid-film stiffness and damping coefficients.

"Performance Analysis of Porous Journal Bearing with Surface Roughness and Thermal Effects.", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 1, page no.60-62, January 2019, Available :http://www.jetir.org/papers/JETIR1901E09.pdf

"Performance Analysis of Porous Journal Bearing with Surface Roughness and Thermal Effects.", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 1, page no. pp60-62, January 2019, Available at : http://www.jetir.org/papers/JETIR1901E09.pdf