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

  • Souad Jabbar Shamal Mechanical Engineering Department University of Kufa, Al-Najaf, Iraq
  • Luay Sadiq Al-Ansari Mechanical Engineering Department University of Kufa, Al-Najaf, Iraq
  • Ahmed Niameh Mehdy Alhusseny Mechanical, Aerospace and Civil Engineering Department, University of Manchester, UK
  • Adel Gharib Nasser Mechanical, Aerospace and Civil Engineering Department, University of Manchester, UK
Keywords: Partial Journal Bearings, Surface Roughness, CFD Analysis, Fluid-Solid Interaction(FSI) Analysis, Thermo-elasto-hydrodynamic Performance.

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.

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Published
2021-01-01
How to Cite
Shamal, S., Al-Ansari, L., Alhusseny, A. and Nasser, A. (2021) “Roughness Effect on Thermo-Elasto-Hydrodynamic Performance of a 170ᵒ -Arc Partial Journal Bearing”, Journal of Engineering, 27(1), pp. 16-34. doi: 10.31026/j.eng.2021.01.02.