Thermohydrodynamic (THD) Analysis of Journal Bearing Operating with Bio-based Nanolubricants

Dhanola, Anil; Garg, H.C.

doi:10.1007/s13369-020-04651-y

Cited by 8 publications

(8 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The results revealed that all the BBLs exhibited lower increases in temperature compared to mineral-based oils, which was attributed to their high thermal stability properties. Dhanola and Garg (2020) introduced nanoparticle additives to BBLs and revealed that the inclusion of nanoparticles significantly improved the pressure, load-carrying capacity (LCC) and friction forces. Meanwhile, Katpatal et al (2020) explored the use of jatropha oil as a BBL, comparing its performance with ISO VG46.…”

Section: Introductionmentioning

confidence: 99%

Bio-based lubricant with additives: tribological performances in hydrodynamic journal bearing

Norazman,

Paiman,

Samion

et al. 2024

ILT

View full text Add to dashboard Cite

Purpose The purpose of this paper is to investigate the performance of bio-based lubricants (BBL), namely, palm mid-olein (PMO) enriched with an antioxidant agent, tertiary-butylhydroquinone (TBHQ) and a viscosity improver, ethylene-vinyl acetate (EVA), in journal bearing (JB) applications. Design/methodology/approach Samples of the BBL were prepared by blending it with TBHQ and EVA at various blending ratios. The oxidative stability (OS) and viscosity of the BBL samples were examined using differential scanning calorimetry and a viscometer, respectively. Meanwhile, their performance in JB applications was evaluated through the use of a JB test rig with a 0.5 length-to-diameter ratio at various operating conditions. Findings It was found that the combination of PMO + TBHQ + EVA demonstrated a superior oil film pressure and load-carrying capacity, resulting in a reduced friction coefficient and a smaller attitude angle compared to the use of only PMO or VG68. However, it was observed that the addition of TBHQ and EVA to the PMO did not have a significant impact on the minimum oil film thickness. Practical implications The results would be quite useful for researchers generally and designers of bearings in particular. Originality/value This study used PMO as the base stock, and its compatibility with TBHQ and EVA was investigated in terms of its OS and viscosity. The performance of this treated BBL was evaluated in a hydrodynamic JB. Peer review The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-11-2023-0363/

show abstract

Section: Introductionmentioning

confidence: 99%

Bio-based lubricant with additives: tribological performances in hydrodynamic journal bearing

Norazman,

Paiman,

Samion

et al. 2024

ILT

View full text Add to dashboard Cite

show abstract

“…Punga based nanolubricant had lower value of friction coefficient and 3.3% higher value of load capacity as compared to base oil (punga) and 38% more load capacity was found in comparison to VG32 mineral oil. Dhanola and Garg [7] analysed the journal bearing performance by the addition of TiO2 nanoparticles in bio-based lubricants and considering various power law index values. Bio-based nanolubricants resulted in higher values of pressure, load capacity and maximum temperature and moreover the increase was more pronounced at higher power law index and increased concentration of nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Effect of TiO2 and CuO Based Nanolubricants on the Static Thermal Performance of Circular Journal Bearings

Dang¹,

Dhami²,

Goyal³

et al. 2021

Tribol. Ind.

View full text Add to dashboard Cite

Circular journal bearings constitute the heart of power generation equipments due to their simple design, ease in manufacturing and high loadcarrying capacity. Hydrodynamic action in these bearings is manifested by the presence of a single oil film, which increases the oil film temperature at higher loads. However, in order to improve the performance of bearings and for overall optimization of equipment efficiency, lubricants with specialized additives are being explored. With the advancements in nanotechnology, lubricants have been blended with nanoparticles for enhancing tribological characteristics. The existing studies are more focused on examining the influence of nanolubricants for boundary lubrication regime. Hence, this article investigates the effect of CuO and TiO2 based nanolubricants in hydrodynamic lubrication regime by studying the static thermal characteristics of circular bearing. Comparative performance analysis has been conducted with both the nanoparticles based lubricants at different concentrations by mixing them in two mineral-based oils having different viscosities. The modified Krieger Dougherty method has been applied for determining the viscosity of nanolubricants. Hydrodynamic pressure and oil film temperature calculations have been performed by developing a model in MATLAB ® R2020a software by considering the effect of variation in the thermophysical properties of nanolubricants. There has been a significant increase in load capacity with just small rise in oil film temperature with the use of nanolubricants. Load capacity with 2wt% addition of TiO2 increased by 14.23% at a journal speed of 2000rpm and eccentricity ratio of 0.6, while there was an increase of 9.23% in the case of CuO at the same parameters. The proposed methodology has an enormous potential for assessing the performance enhancement of turbomachinery used for power generation.

show abstract

“…Most often, journal bearings are operated with mineral oils and synthetic lubricants because of their excellent physico-chemical properties. 2,3 To date, several experimental investigations have been performed on journal-bearing test rigs using petroleum-based lubricants. Bouyer and Fillon 4 studied the frictional behavior of a plain journal bearing using ISO VG 32 during start-up.…”

Section: Introductionmentioning

confidence: 99%

“…20–23 Moreover, a considerable amount of theoretical investigations are available, which deal with the study of journal bearings operating with nanolubricants. 3,24–26 Nevertheless, very few researchers have carried out experimental research to investigate the performance of conventional and vegetable oil-based nanolubricants under a hydrodynamic lubrication regime. Baskar et al 27 investigated the frictional behavior of chemically modified rapeseed oil added with different nanomaterials (titanium oxide (TiO 2 ), tungsten disulfide, and copper oxide (CuO)) and a synthetic lubricant (SAE 20W40) using a journal-bearing test rig.…”

Section: Introductionmentioning

confidence: 99%

Experimental analysis of the efficacy of vegetable oil-based nanolubricants for improving journal-bearing performance

Dhanola

Garg

2021

Proceedings of the Institution of Mechanical Engineers, Part J:

Self Cite

View full text Add to dashboard Cite

The present experimental study explores the performance of Hydrodynamic journal bearings operating with vegetable oil-based nanolubricants. For this study, titanium oxide nanoparticles have been added to canola oil by varying the volume fraction from 0% to 0.04%. An assessment of performance characteristics has been done by using a journal-bearing test rig under different operating conditions. The outcome of the experimental results aimed at the addition of nanoparticles to base lubricants to improve the performance was observed to be favorable. However, under high operating conditions, the influence of nanoparticles is observed to be less useful. The fluid film pressure of nanolubricants increased up to a specific volume concentration of titanium oxide nanoparticles (i.e. 0.02%) beyond which no further enhancement was observed. At a load of 3000 N, the fluid film pressure increased up to 10%, when a bearing is lubricated using canola oil with a 0.02% volume fraction of nanoparticles. The heat transfer rate was found to be higher for nanolubricants in comparison to a base oil and the fluid film temperature was reduced by up to 15% at a volume fraction of 0.04%. Furthermore, rheological studies reveal that the prepared nanolubricants exhibited Newtonian behavior under the given conditions. The percentage increment of viscosity varied from 2.1% to 15.4% and 2.43% to 13.89% for a volume fraction ranging from 0.01% to 0.04% at a temperature of 40 °C and 100 °C, respectively. The dynamic light scattering results confirmed that the particles were well distributed in a base lubricant without much aggregation.

show abstract

Thermohydrodynamic (THD) Analysis of Journal Bearing Operating with Bio-based Nanolubricants

Cited by 8 publications

References 37 publications

Bio-based lubricant with additives: tribological performances in hydrodynamic journal bearing

Bio-based lubricant with additives: tribological performances in hydrodynamic journal bearing

Effect of TiO2 and CuO Based Nanolubricants on the Static Thermal Performance of Circular Journal Bearings

Experimental analysis of the efficacy of vegetable oil-based nanolubricants for improving journal-bearing performance

Contact Info

Product

Resources

About