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Cavitation effects on textured compression rings in mixed lubrication.

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Title: Cavitation effects on textured compression rings in mixed lubrication.
Authors: Zavos, Anastasios1, Nikolakopoulos, Pantelis G.1 pnikolak@mech.upatras.gr
Source: Lubrication Science. Dec2016, Vol. 28 Issue 8, p475-504. 30p.
Subjects: Compression loads, Lubrication & lubricants, Materials texture, Hydrodynamics, Navier-Stokes equations, Boundary value problems
Abstract: Thin lubricant films and cavitation to ring-bore contact have a directly correlation between wear and emissions output of internal combustion engines. Thus, there is a need to develop innovate engineering solutions such as surface texturing. In particular, micro textures are manufactured in order to keep more lubricant in weakly lubricated contact. An isothermal mixed-hydrodynamic analysis was developed for textured compression rings, which utilised the effects of two-phase flow using Navier-Stokes equations, vapour transport and asperity interaction. Realistic boundary conditions are used from a real motorbike engine. This paper employs a computational model including multiphase flow of the ring-bore conjunction in order to predict the effects of surface texturing of the barrel face ring around the dead centres. The model is validated using numerical and experimental results from the literature. Additionally, flow simulations have been performed, on how micro-dimples shape and depth on the ring liner affect on the total friction and minimum lubricant film. Copyright © 2016 John Wiley & Sons, Ltd. [ABSTRACT FROM AUTHOR]
Copyright of Lubrication Science is the property of Wiley-Blackwell 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.)
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  Data: Cavitation effects on textured compression rings in mixed lubrication.
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  Data: <searchLink fieldCode="AR" term="%22Zavos%2C+Anastasios%22">Zavos, Anastasios</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Nikolakopoulos%2C+Pantelis+G%2E%22">Nikolakopoulos, Pantelis G.</searchLink><relatesTo>1</relatesTo><i> pnikolak@mech.upatras.gr</i>
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  Data: <searchLink fieldCode="JN" term="%22Lubrication+Science%22">Lubrication Science</searchLink>. Dec2016, Vol. 28 Issue 8, p475-504. 30p.
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  Data: <searchLink fieldCode="DE" term="%22Compression+loads%22">Compression loads</searchLink><br /><searchLink fieldCode="DE" term="%22Lubrication+%26+lubricants%22">Lubrication & lubricants</searchLink><br /><searchLink fieldCode="DE" term="%22Materials+texture%22">Materials texture</searchLink><br /><searchLink fieldCode="DE" term="%22Hydrodynamics%22">Hydrodynamics</searchLink><br /><searchLink fieldCode="DE" term="%22Navier-Stokes+equations%22">Navier-Stokes equations</searchLink><br /><searchLink fieldCode="DE" term="%22Boundary+value+problems%22">Boundary value problems</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: Thin lubricant films and cavitation to ring-bore contact have a directly correlation between wear and emissions output of internal combustion engines. Thus, there is a need to develop innovate engineering solutions such as surface texturing. In particular, micro textures are manufactured in order to keep more lubricant in weakly lubricated contact. An isothermal mixed-hydrodynamic analysis was developed for textured compression rings, which utilised the effects of two-phase flow using Navier-Stokes equations, vapour transport and asperity interaction. Realistic boundary conditions are used from a real motorbike engine. This paper employs a computational model including multiphase flow of the ring-bore conjunction in order to predict the effects of surface texturing of the barrel face ring around the dead centres. The model is validated using numerical and experimental results from the literature. Additionally, flow simulations have been performed, on how micro-dimples shape and depth on the ring liner affect on the total friction and minimum lubricant film. Copyright © 2016 John Wiley & Sons, Ltd. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Lubrication Science is the property of Wiley-Blackwell 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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        Value: 10.1002/ls.1341
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        Text: English
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        PageCount: 30
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      – SubjectFull: Compression loads
        Type: general
      – SubjectFull: Lubrication & lubricants
        Type: general
      – SubjectFull: Materials texture
        Type: general
      – SubjectFull: Hydrodynamics
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      – SubjectFull: Navier-Stokes equations
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      – SubjectFull: Boundary value problems
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      – TitleFull: Cavitation effects on textured compression rings in mixed lubrication.
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              M: 12
              Text: Dec2016
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              Y: 2016
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