Analysis and Optimization of Nanolubricated Journal Bearing under Thermoelasto-Hydrodynamic Lubrication Considering Cavitation Effect

Q3 Engineering

Tribology in Industry Pub Date : 2023-12-15 DOI:10.24874/ti.1441.01.23.04

Basim A. Abass, Saba Y. Ahmed, Zainab H. Kadhim

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引用次数: 0

Abstract

This work deals with the effect of the cavitation and the elastic deformation on the steady-state thermal performance of plain journal bearing using CFD-FSI technique. As a case study, a bearing lubricated with SAE40W oil dispersed with TiO2 nanoparticles was extensively analyzed. The hydrodynamic pressure, oil film temperature, and the other bearing parameters have been calculated. The nanoparticles volume fractions, journal speeds, and eccentricity ratios have been considered. Krieger Dougherty model was implemented with the Vogel- Barus exponential viscosity to include the effects of the oil temperature and TiO2 nanoparticles volume fraction on the lubricant viscosity. The cavitation effect was implemented using Zwart-Gerber-Belamari model. The optimum journal position, the attitude angle, and the load have been obtained using Multi-Objective Genetic Algorithm. The mathematical model was successfully verified with the pressure and the total deformation published by Dhande with 4% and 2% deviation between the results respectively. The film temperature of the present work was compared to that obtained numerically by Li et al and experimentally by Ferron and Boncompain with 2% maximum deviation between the results. An enhancement in the load-carrying capacity of the bearing with a little growth in oil film temperature were obtained when using TiO2 nano lubricant.

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考虑空化效应的热液-流体动力润滑条件下纳米润滑关节轴承的分析与优化

本研究利用 CFD-FSI 技术探讨了空化和弹性变形对滑动轴承稳态热性能的影响。作为案例研究，对使用分散有 TiO2 纳米颗粒的 SAE40W 润滑油的轴承进行了广泛分析。计算了流体动力压力、油膜温度和其他轴承参数。还考虑了纳米颗粒的体积分数、轴颈速度和偏心率。利用 Vogel- Barus 指数粘度建立了 Krieger Dougherty 模型，以包括油温和 TiO2 纳米颗粒体积分数对润滑油粘度的影响。利用 Zwart-Gerber-Belamari 模型实现了空化效应。使用多目标遗传算法获得了最佳轴颈位置、姿态角和载荷。数学模型成功地与 Dhande 公布的压力和总变形进行了验证，结果之间的偏差分别为 4% 和 2%。本研究的薄膜温度与 Li 等人的数值结果以及 Ferron 和 Boncompain 的实验结果进行了比较，两者之间的最大偏差为 2%。使用二氧化钛纳米润滑剂提高了轴承的承载能力，但油膜温度略有上升。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Tribology in Industry Engineering-Mechanical Engineering

CiteScore

2.80

自引率

0.00%

发文量

审稿时长

8 weeks

期刊介绍： he aim of Tribology in Industry journal is to publish quality experimental and theoretical research papers in fields of the science of friction, wear and lubrication and any closely related fields. The scope includes all aspects of materials science, surface science, applied physics and mechanical engineering which relate directly to the subjects of wear and friction. Topical areas include, but are not limited to: Friction, Wear, Lubricants, Surface characterization, Surface engineering, Nanotribology, Contact mechanics, Coatings, Alloys, Composites, Tribological design, Biotribology, Green Tribology.