Performance analysis of elliptical journal bearing lubricated with experimentally characterized nanolubricant considering thermal effect using CFD technique

IF 1.2 Q3 ENGINEERING, MECHANICAL

FME Transactions Pub Date : 2023-01-01 DOI:10.5937/fme2304550a

Basim Abass, Ahmed Saba, Mohamed Yaser

引用次数: 0

Abstract

This study uses computational fluid dynamics (CFD) to quantitatively examine the performance of an elliptical journal bearing (EJB) lubricated with TiO2 and ZnO nano-lubricant considering thermal effect. In an experiment, nanoparticles with particle concentrations varying from 0 to 2 weight percent are mixed with SAE15W40 engine oil to create these lubricants. The impact of weight fractions, rotational speed, eccentricity, and ellipticity ratios on the thermal performance of the EJB has been examined. The Kreger-Dougherty model is employed to understand the effects of oil film temperature as well as nanoparticle concentration on lubricant viscosity. The pressure and temperature determined by (Dang 2020) and (Wang 2021were evaluated against the CFD model with good agreement. The findings show that for 2 wt% nanoparticles, e of 0.6 and N of 5000 rpm, the load-carrying capacity increased by 5.5% and 4% and the side leakage flow decreased by 24.4% and 18%.

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考虑热效应的实验表征纳米润滑剂润滑椭圆轴颈轴承性能CFD分析

本文采用计算流体动力学(CFD)方法，对考虑热效应的TiO2和ZnO纳米润滑剂润滑椭圆轴颈轴承(EJB)的性能进行了定量研究。在一项实验中，将颗粒浓度在0 - 2%之间的纳米颗粒与SAE15W40发动机油混合，制成这些润滑油。考察了重量分数、转速、偏心率和椭圆率对EJB热性能的影响。采用kgreger - dougherty模型研究油膜温度和纳米颗粒浓度对润滑油粘度的影响。根据CFD模型对(Dang 2020)和(Wang 2021)确定的压力和温度进行了评估，结果吻合良好。结果表明:当纳米颗粒质量分数为2 wt%、e = 0.6、N = 5000 rpm时，负载能力分别提高5.5%和4%，侧漏流量分别减少24.4%和18%;

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

FME Transactions ENGINEERING, MECHANICAL-

CiteScore

3.60

自引率

31.20%

发文量

审稿时长

12 weeks