Roughness Effect on Thermo-Elasto-Hydrodynamic Performance of a 170ᵒ -Arc Partial Journal Bearing

Abstract

In the current analysis, the effects of circumferential scratches along the inner surface of a 170ᵒ -arc partial journal bearing has been numerically investigated. Their impact on the thermo-elasto-hydrodynamic performance characteristics, including maximum pressure, temperature, deformation, and stress, has been examined thoroughly. The ANSYS Fluent CFD commercial code was employed to tackle the iterative solution of flow and heat transfer patterns in the fluid film domain. They are then applied to the ANSYS Static Structure solver to compute the deformation and stress resulted in the solid bearing zone. A wide range of operating conditions has been considered, including the eccentricity ratio ( ) and scratch depth ( ). In contrast, the bearing length-diameter ratio (L/D) and the rotation speed (N) have been fixed at 0.77 and 1500 rpm, respectively. The thermo-hydrodynamic pressure, temperature, stress, and deformation have all been computed. It was found that the scratch depth has a direct effect on the thermo-hydrodynamic performance of the partial bearings. Meanwhile, the deep central scratches are important, especially at scratch depth equal to 0.224 mm.

Micropolar lubricant effects on the performance of partial journal bearings

“…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°p artial bearing were presented by Shamal et al 17 They discussed the circumferential effect of scratches on the static and thermal parameters. Non-Newtonian behavior of lubricant was studied by References [18][19][20] with couple stress fluid, [21][22][23] with nano-fluid.…”

“…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.…”

Stability analysis of partial journal bearings lubricated with micropolar fluid

“…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).…”