Performance behaviours of a self-acting gas journal bearing with a new bore design

• Published in: Tribology international Vol. 151; p. 106418
• Main Authors: Pattnayak, M.R., Pandey, R.K., Dutt, J.K.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.11.2020; Elsevier BV
• Subjects: Bearing strength; Dynamic stability; Film thickness; Foil bearings; Gas foil journal bearing; Journal bearings; Load carrying capacity; Mathematical analysis; New bore design; Numerical simulation; Parameters; Static and dynamic performances; Gas foil journal bearing; Numerical simulation; Static and dynamic performances; New bore design; Dynamic stability
• ISSN: 0301-679X; 1879-2464
• DOI: 10.1016/j.triboint.2020.106418

A new bore design of a self-acting gas journal bearing has been conceived for enhancing the load carrying capacity and dynamic stability parameters as compared to conventional bump-foil bearing. The new bore design involves the synergistic presence of bump foil and rigid sector segments. The governing equations have been discretized employing FVM/FDM followed by the solutions of the algebraic equations using Gauss-Siedel iterative scheme. Based on the investigations performed with new bore, 5–260% increase in minimum film thickness and 80–175% improvement in stability parameters have been achieved for the range of operating parameters adopted in present study in comparison to conventional bump-foil journal bearing. •Design of a new bore of self-acting gas journal bearing has been proposed.•Static characteristics analyzed are eccentricity ratio, film thickness, side flow, maximum pressure and attitude angle.•Dynamic performance parameters investigated are bearing dynamic coefficients, critical frequency, and critical mass.•With the new bore bearing, improvement in film thickness and load carrying capacity have happened.•Better dynamic performance has been achieved with the new bearing bore.