Abstract In recent years, extensive use of smart lubricants has been made in order to control the tribological performance of fluid film bearings. The grooved surfaces of the journal bearing greatly influence the performance of bearings. In the present work, various geometric shapes of herringbone grooves (rectangular, triangular, and parabolic) with groove angles (30° and 60°) have been considered to numerically simulate the performance of slot-entry bearings. The work reported in this article deals with the numerical simulation of magnetorheological (MR) fluid–lubricated slot-entry herringbone-grooved hybrid journal bearings. Dave equation, a constitutive relation of the Bingham model, was employed to simulate the flow behavior of MR fluid. Using the finite element method (FEM), the governing Reynolds equation for a hybrid slot-entry bearing model was solved. The result shows that the use of a herringbone-grooved surface and application of MR fluid in a slot-entry bearing offers better stability and higher fluid film stiffness and minimizes frictional torque.

中文翻译：

---

磁流变流体在人字形槽混合开槽轴承上的行为模拟研究

摘要 近年来，为了控制油膜轴承的摩擦学性能，智能润滑剂得到了广泛的应用。轴颈轴承的槽面对轴承的性能影响很大。在目前的工作中，已经考虑了具有槽角（30°和 60°）的各种几何形状的人字形槽（矩形、三角形和抛物线）来数值模拟开槽轴承的性能。本文报道的工作涉及磁流变 (MR) 流体润滑的切槽人字形槽混合径向轴承的数值模拟。Dave 方程是 Bingham 模型的本构关系，用于模拟 MR 流体的流动行为。使用有限元法（FEM），求解了混合开槽轴承模型的控制雷诺方程。结果表明，在开槽轴承中使用人字形凹槽表面和应用 MR 流体可提供更好的稳定性和更高的流体膜刚度，并最大限度地减少摩擦扭矩。