Numerical study of the effect of ZnO/MWCNT lubricant additives on density and piston ring lubrication under cylinder liner distortions.
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| Title: | Numerical study of the effect of ZnO/MWCNT lubricant additives on density and piston ring lubrication under cylinder liner distortions. |
|---|---|
| Authors: | Dimitrakopoulos, Michail1 (AUTHOR), Zavos, Anastasios1 (AUTHOR), Nikolakopoulos, Pantelis1 (AUTHOR) pnikolakop@upatras.gr |
| Source: | Alexandria Engineering Journal. Apr2025, Vol. 118, p618-637. 20p. |
| Subjects: | Internal combustion engines, Engine cylinders, Lubricant additives, Piston rings, Sine waves, Lubrication & lubricants, Elastohydrodynamic lubrication |
| Abstract: | This study aims to model the actual shape of an internal combustion engine cylinder liner and investigate how its axial and radial deformations, coupled with emerging lubricants containing nano-particle additives, impact the design parameters governing piston compression ring tribological behavior. The viscosity behavior of non-Newtonian lubricants with nano-particle additives is obtained by using the Power Law model. The effect of oil additives and tribofilm formation is not included in the lubricant viscosity, its variation with pressure, or the wear coefficient. The study focuses on a SAE10W40 lubricant oil with ZnO/MWCNT nano-particles additives, based on data from current literature. Analysis using Archard's model with non-Gaussian surface distribution, reveals the combined deformations effect on compression ring wear in terms of wear depth and material volume loss. Additionally, a blow-by model is incorporated to approximate real engine operating conditions. Predictions for compression ring friction and minimum lubricant film thickness are generated. The findings underscore the significant impact of cylinder deformation profiles on compression ring friction behavior, particularly with respect to the number of sine waves, across all lubricant cases. Notably, the study shows a 21 % drop in friction force with nanoparticle-enhanced lubricant, highlighting their importance. [ABSTRACT FROM AUTHOR] |
| Copyright of Alexandria Engineering Journal is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 184601785 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Numerical study of the effect of ZnO/MWCNT lubricant additives on density and piston ring lubrication under cylinder liner distortions. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Dimitrakopoulos%2C+Michail%22">Dimitrakopoulos, Michail</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zavos%2C+Anastasios%22">Zavos, Anastasios</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Nikolakopoulos%2C+Pantelis%22">Nikolakopoulos, Pantelis</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> pnikolakop@upatras.gr</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Alexandria+Engineering+Journal%22">Alexandria Engineering Journal</searchLink>. Apr2025, Vol. 118, p618-637. 20p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Internal+combustion+engines%22">Internal combustion engines</searchLink><br /><searchLink fieldCode="DE" term="%22Engine+cylinders%22">Engine cylinders</searchLink><br /><searchLink fieldCode="DE" term="%22Lubricant+additives%22">Lubricant additives</searchLink><br /><searchLink fieldCode="DE" term="%22Piston+rings%22">Piston rings</searchLink><br /><searchLink fieldCode="DE" term="%22Sine+waves%22">Sine waves</searchLink><br /><searchLink fieldCode="DE" term="%22Lubrication+%26+lubricants%22">Lubrication & lubricants</searchLink><br /><searchLink fieldCode="DE" term="%22Elastohydrodynamic+lubrication%22">Elastohydrodynamic lubrication</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: This study aims to model the actual shape of an internal combustion engine cylinder liner and investigate how its axial and radial deformations, coupled with emerging lubricants containing nano-particle additives, impact the design parameters governing piston compression ring tribological behavior. The viscosity behavior of non-Newtonian lubricants with nano-particle additives is obtained by using the Power Law model. The effect of oil additives and tribofilm formation is not included in the lubricant viscosity, its variation with pressure, or the wear coefficient. The study focuses on a SAE10W40 lubricant oil with ZnO/MWCNT nano-particles additives, based on data from current literature. Analysis using Archard's model with non-Gaussian surface distribution, reveals the combined deformations effect on compression ring wear in terms of wear depth and material volume loss. Additionally, a blow-by model is incorporated to approximate real engine operating conditions. Predictions for compression ring friction and minimum lubricant film thickness are generated. The findings underscore the significant impact of cylinder deformation profiles on compression ring friction behavior, particularly with respect to the number of sine waves, across all lubricant cases. Notably, the study shows a 21 % drop in friction force with nanoparticle-enhanced lubricant, highlighting their importance. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Alexandria Engineering Journal is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.aej.2025.01.102 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 20 StartPage: 618 Subjects: – SubjectFull: Internal combustion engines Type: general – SubjectFull: Engine cylinders Type: general – SubjectFull: Lubricant additives Type: general – SubjectFull: Piston rings Type: general – SubjectFull: Sine waves Type: general – SubjectFull: Lubrication & lubricants Type: general – SubjectFull: Elastohydrodynamic lubrication Type: general Titles: – TitleFull: Numerical study of the effect of ZnO/MWCNT lubricant additives on density and piston ring lubrication under cylinder liner distortions. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Dimitrakopoulos, Michail – PersonEntity: Name: NameFull: Zavos, Anastasios – PersonEntity: Name: NameFull: Nikolakopoulos, Pantelis IsPartOfRelationships: – BibEntity: Dates: – D: 15 M: 04 Text: Apr2025 Type: published Y: 2025 Identifiers: – Type: issn-print Value: 11100168 Numbering: – Type: volume Value: 118 Titles: – TitleFull: Alexandria Engineering Journal Type: main |
| ResultId | 1 |
