Numerical study and parameter optimization of partial journal bearing using MOPSO algorithm

Abstract

In this paper, multi-objective particle swarm optimization method is developed for optimizing thermo-hydrodynamic journal bearings. This paper focuses on the use of multi-objective particle swarm optimization algorithm with a combination of the thermal hydrodynamic governing equations of the fluid film (i.e. momentum and energy equations) to optimize hydrodynamic partial pad journal bearings and compare with other articles. The governing equations are solved by the central difference method with a successive over-relaxation scheme and the backward difference with an iterative technique. In the paper, the lubricant viscosity changes with the temperature variation in whole fluid film. In this optimization, the bearing power loss, the minimum oil film thickness, and the maximum oil temperature are considered as objective functions and the radial clearance and length to diameter ratio are selected as design variables. The results of the objective functions are compared to other articles. Also, this study discusses the entropy and availability of two concentric cylinders with low curvature and constant wall temperature. Calculations showed that by increasing the Eckert number, the availability increases.

Micropolar lubricant effects on the performance of partial journal bearings

“…Researchers [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17] observed the deviations in the theoretical and experimental data of the static performance of journal bearing. Practical changes in the lubrication were proposed by researchers to improve the performance of journal bearings.…”

“…The rotating journal raises the temperature of working lubricants and the higher temperature may lead to deformation of the bearing. Hence researchers 12–17 studied the effect of temperature on the static performance of partial journal bearing, in terms of load capacity, attitude angle for various arc angle bearings using variational approach and finite difference method. Safar and Szeri 12 computed the performance of 120° partial bearing.…”

“…15 They observed that maximum hydrodynamic pressure is developed at higher eccentricity for partial angle of 180° as compared with 60° partial angle. Effect of temperature on static performance of partial journal bearing is optimized by Mikaeeli et al, 16 using the swarn optimization method. Thermal and elastic effects on the performance of 170° partial bearing were presented by Shamal et al 17 They discussed the circumferential effect of scratches on the static and thermal parameters.…”

Stability analysis of partial journal bearings lubricated with micropolar fluid

“…The thermal behaviour of partial journal bearings was presented by Yu and Szevi (1975) for different arc angles and bearing aspect ratios. The swarm optimization method is efficiently applied by Mikaeeli et al (2020) in computing the static performance of partial journal bearings. The effect of temperature and flexibility of the journal on the performance of a 170° partial arc bearing was reported by Shamal et al (2021).…”