Two lobe non-recessed roughened hybrid journal bearing – A comparative study

• Performance characteristics of a two lobe non-recessed hybrid journal bearing.
• Studied the effect of different forms of surface roughness patterns.
• A comparative study by using different flow control devices.
• Roughness orientation may have a significant effect on bearing performance.

The present paper examines the influence of surface roughness on the performance of two lobe hybrid journal bearing. The performance characteristics of two lobe journal bearings compensated with different types of flow control devices such as orifice, capillary, constant flow valve and slot restrictors, have been presented for different forms of roughness patterns such as transverse, longitudinal, isotropic and smooth surface. The results of the study indicate that roughness orientation significantly affects the performance of bearing system. Further, results indicates that, a proper selection of roughness pattern parameter, offset factor and compensating device is essential to enhance the bearing performance.