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Effect of inertia on the cavitation phenomena of hydrodynamic textured bearings considering slip

  • J. Jamari
  • M. Muchammad
  • F. Hilmy
  • M. TauviqirrahmanEmail author
Technical Paper
  • 39 Downloads

Abstract

Surface modification of a lubricated bearing, such as hydrophobic coating inducing slip situation and texturing, is proved to enhance hydrodynamic performance. As widely known, in textured surface lubricant inertia and cavitation can significantly affect the hydrodynamic pressure profile. However, a brief literature review indicates that studies related to the correlation between cavitation and inertia, especially in the presence of slip, are considerably limited. The present study examines the effect of inertia on cavitation phenomena by considering the slip boundary using two approaches, namely computational fluid dynamics based on full Navier–Stokes equations and analytical lubrication equation based on the Reynolds equation. The modified Reynolds equation with slip concept is used with respect to the slip effect applied on the surface of the bearing. The results indicate that the inertia as well as the slip condition significantly affects the cavitation area. It is also highlighted that the cavitation area reduces by increasing the inertia effect, and it becomes smaller when the slip is introduced.

Keywords

Cavitation Computational fluid dynamics (CFD) Inertia Lubrication Slip 

List of symbols

a

Inlet length

b

Texture (dimple) length

Bo

Slider length

c

Outlet land length

hd

Texture depth

ho

Land film thickness in inlet land at B

patm

Atmospheric pressure

pcav

Cavitation pressure

U

Sliding velocity

W

Load support

x

Coordinate in sliding direction

z

Coordinate through film thickness

μ

Lubricant dynamic viscosity

αs, αh

Slip coefficients at surface s (moving) and h (stationary)

Notes

References

  1. 1.
    Safar ZS, Shawki GSA (1978) Do convective inertia forces affect turbulent bearing characteristics. Tribol Int 11(4):248–249CrossRefGoogle Scholar
  2. 2.
    Kakoty SK, Majumdar BC (1999) Effect of fluid inertia on stability of flexibly supported oil journal bearings: linear perturbation analysis. Tribol Int 32:217–228CrossRefGoogle Scholar
  3. 3.
    Khalil MF, Kassab SZ, Ismail AS (1992) Influence of inertia forces on the performance of turbulent externally pressurized bearings. Tribol Int 25(1):17–25CrossRefGoogle Scholar
  4. 4.
    Stolarski TA, Chai W (2008) Inertia effect in squeeze film air contact. Tribol Int 41:716–723CrossRefGoogle Scholar
  5. 5.
    Walicka A, Jurczak P (2017) Influence of total inertia effects in a thrust curvilinear bearing lubricated with Newtonian lubricants. Int J Appl Mech Eng 22(4):1045–1058CrossRefGoogle Scholar
  6. 6.
    Okabe EP (2017) Analytical model of a tilting pad bearing including turbulence and fluid inertia effects. Tribol Int 114:245–256CrossRefGoogle Scholar
  7. 7.
    Lin X, Jiang S, Zhang C, Liu X (2018) Thermohydrodynamic analysis of high-speed water-lubricated spiral groove thrust bearing considering effects of cavitation, inertia and turbulence. Tribol Int 119:645–658CrossRefGoogle Scholar
  8. 8.
    Syed I, Sarangi M (2014) Hydrodynamic lubrication with deterministic micro textures considering fluid inertia effect. Tribol Int 69:30–38CrossRefGoogle Scholar
  9. 9.
    Woloszynski T, Podsiadlo P, Stachowiak GW (2015) Evaluation of inertia effect in finite hydrodynamic bearings with surface texturing using spectral element solver. Tribol Int 91:170–176CrossRefGoogle Scholar
  10. 10.
    Dobrica MB, Fillon M (2009) About the validity of Reynolds equation and inertia effects in textured sliders of infinite width. Proc Inst Mech Eng Part J J Eng Tribol 223:69–78CrossRefGoogle Scholar
  11. 11.
    Salant RF, Fortier AE (2004) Numerical analysis of a slider bearing with a heterogeneous slip/no-slip surface. Tribol Trans 47:328–334CrossRefGoogle Scholar
  12. 12.
    Wu CW, Ma GJ, Zhou P (2006) Low friction and high load support capacity of slider bearing with a mixed slip surface. J Tribol 128:904–907CrossRefGoogle Scholar
  13. 13.
    Ma GJ, Wu CW, Zhou P (2007) Hydrodynamic of slip wedge and optimization of surface slip property. Sci China Phys Mech Astron 50:321–330CrossRefGoogle Scholar
  14. 14.
    Ma GJ, Wu CW, Zhou P (2007) Influence of wall slip on the hydrodynamic behaviour of a two-dimensional slider bearing. Acta Mech Sin 23:655–661CrossRefGoogle Scholar
  15. 15.
    Bayada G, Meurisse MH (2009) Impact of the cavitation model on the theoretical performance of heterogeneous slip/no-slip engineered contacts in hydrodynamic conditions. Proc Inst Mech Eng Part J J Eng Tribol 223:371–381CrossRefGoogle Scholar
  16. 16.
    Rao TVVLN (2010) Analysis of single-grooved slider and journal bearing with partial slip surface. J Tribol 132:014501-1–014501-7Google Scholar
  17. 17.
    Aurelian F, Patrick M, Mohamed H (2011) Wall slip effects in (elasto) hydrodynamic journal bearing. Tribol Int 44:868–877CrossRefGoogle Scholar
  18. 18.
    Tauviqirrahman M, Ismail R, Jamari J, Schipper DJ (2013) A study of surface texturing and boundary slip on improving the load support of lubricated parallel sliding contacts. Acta Mech 224:365–381MathSciNetCrossRefGoogle Scholar
  19. 19.
    Syed I, Sarangi M (2018) Combined effects of fluid–solid interfacial slip and fluid inertia on the hydrodynamic performance of square shape textured parallel sliding contacts. J Braz Soc Mech Sci Eng 40:314CrossRefGoogle Scholar
  20. 20.
    Wang L, Lu C (2015) Numerical analysis of spiral oil wedge sleeve bearing including cavitation and wall slip effect. Lubr Sci 27(3):193–207MathSciNetCrossRefGoogle Scholar
  21. 21.
    Muchammad M, Tauviqirrahman M, Jamari J, Schipper DJ (2017) An analytical approach on the tribological behaviour of pocketed slider bearings with boundary slip including cavitation. Lubr Sci 29:133–152CrossRefGoogle Scholar
  22. 22.
    Olver AV, Fowell MT, Spikes HA, Pegg IG (2006) ‘Inlet suction’ a load support mechanism in non-convergent pocketed hydrodynamic bearings. Proc Inst Mech Eng Part J J Eng Tribol 220:105–108CrossRefGoogle Scholar
  23. 23.
    Fowell M, Olver AV, Gosman AD, Spikes HA, Pegg I (2007) Entrainment and inlet suction: two mechanisms of hydrodynamic lubrication in textured bearings. ASME J Tribol 129:337–347Google Scholar
  24. 24.
    ANSYS (2011) ANSYS Fluent, version 14.0: user manual. ANSYS Inc., CanonsburgGoogle Scholar
  25. 25.
    Dhande DY, Pande DW (2018) Multiphase flow analysis of hydrodynamic journal bearing using CFD coupled fluid structure interaction considering cavitation. J King Saud Univ Eng Sci 30:345–354Google Scholar
  26. 26.
    Sun D, Li S, Fei C, Ai Y, Liem RP (2019) Investigation of the effect of cavitation and journal whirl on static and dynamic characteristics of journal bearing. J Mech Sci Tech 33(1):77–86CrossRefGoogle Scholar

Copyright information

© The Brazilian Society of Mechanical Sciences and Engineering 2019

Authors and Affiliations

  1. 1.Laboratory for Engineering Design and Tribology, Mechanical Engineering Department, Faculty of EngineeringUniversity of DiponegoroSemarangIndonesia
  2. 2.Laboratory for Surface Technology and Tribology, Faculty of Engineering TechnologyUniversity of TwenteEnschedeThe Netherlands

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