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This study numerically compares the performance of circular and elliptical hydrodynamic journal bearings in the presence of misalignment. A finite element method, applied to the Reynolds equation, was used to analyze the influence of variations in load, speed and misalignment angle on the main characteristics of these bearings. The results show that elliptical bearings are clearly superior to circular bearings under misalignment conditions. Specifically, the minimum film thickness of the elliptical bearings was approximately 10.56% greater than that of the circular bearings for the maximum misalignment tested. In addition, the maximum pressure of the elliptical bearings was 2.7% higher than that of the circular bearings under misalignment conditions, while under perfect alignment conditions it was 4.8% higher.

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A Comparative Study of Circular and Elliptical Hydrodynamic Bearings Performances with Misalignment Effect

  • 会议论文

  • 发表日期：

    2026年

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  • Walid Ifrah,
  • Ahmed Chellil,
  • Belkacem Manser,
  • Hamza Mechakra,
  • Amine Houari,
  • Brahim Chebbab,
  • Abdelhakim Daoui

摘要

This study numerically compares the performance of circular and elliptical hydrodynamic journal bearings in the presence of misalignment. A finite element method, applied to the Reynolds equation, was used to analyze the influence of variations in load, speed and misalignment angle on the main characteristics of these bearings. The results show that elliptical bearings are clearly superior to circular bearings under misalignment conditions. Specifically, the minimum film thickness of the elliptical bearings was approximately 10.56% greater than that of the circular bearings for the maximum misalignment tested. In addition, the maximum pressure of the elliptical bearings was 2.7% higher than that of the circular bearings under misalignment conditions, while under perfect alignment conditions it was 4.8% higher.