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http://dx.doi.org/10.9725/kts.2022.38.6.267

THD Lubrication Analysis of a Surface-Textured Parallel Thrust Bearing with Rectangular Grooves: Part 1 - Effect of Film-Temperature Boundary Condition  

Park, TaeJo (School of Mechanical Engineering, ERI, Gyeongsang National University)
Kang, JeongGuk (Graduate School, School of Mechanical & Aerospace Engineering, Gyeongsang National University)
Publication Information
Tribology and Lubricants / v.38, no.6, 2022 , pp. 267-273 More about this Journal
Abstract
Surface texturing is the latest technology for processing grooves or dimples on the friction surface of a machine. When appropriately applied, it can reduce friction and significantly increase durability. Despite many studies over the past 20 years, most are isothermal (ISO) analyses in which the viscosity of the lubricant is constant. In practice, the viscosity changes significantly owing to the heat generated by the viscous shear of the lubricant and film-temperature boundary condition (FTBC). Although many thermohydrodynamic (THD) analyses have been performed on various sliding bearings, only few results for surface-textured bearings have been reported. This study investigates the effects of the FTBC and groove number on the THD lubrication characteristics of a surface-textured parallel thrust bearing with multiple rectangular grooves. The continuity, Navier-Stokes, and energy equations with temperature-viscosity-density relations are numerically analyzed using a commercial computational fluid dynamics code, FLUENT. The results show the pressure and temperature distributions, variations of load-carrying capacity (LCC), and friction force with four FTBCs. The FTBCs greatly influence the lubrication characteristics of surface-textured parallel thrust bearings. A groove number that maximizes the LCC exists, which depends on the FTBC. ISO analysis overestimates the LCC but underestimates friction reduction. Additional analysis of various temperature boundary conditions is required for practical applications.
Keywords
Computational fluid dynamics(CFD); Film-temperature boundary condition; Parallel thrust bearing; Surface texturing; Thermohydrodynamic lubrication(THD);
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Times Cited By KSCI : 4  (Citation Analysis)
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1 Park, T. J., Kim, M. G., "Lubrication characteristics of surface textured parallel thrust bearing with ellipsoidal dimples", J. Korean Soc. Tribol. Lubr. Eng., Vol.32, No.5, pp.147-153, 2016, https://doi.org/10.9725/kstle.2016.32.5.147   DOI
2 Pinkus, O., Thermal aspects of fluid film tribology, ASME Press, New York, 1990.
3 Cupillard, S., Glavatskih, S., Cervantes, M. J., "3D thermohydrodynamic analysis of a textured slider", Tribol. Int., Vol.42, No.10, pp.1487-1495, 2009.   DOI
4 Papadopoulos, C. I., Kaiktsis, L., Fillon, M., "Computational fluid dynamics thermohydrodynamic analysis of three-dimensional sector-pad thrust bearings with rectangular dimples", ASME J. Tribol., Vol.136, No.1, p.011702, 2014.   DOI
5 Meng, X., Khonsari, M. M. "On the effect of viscosity wedge in micro-textured parallel surfaces", Tribol. Int., Vol.107, pp.116-124, 2017.   DOI
6 Meng, X., Khonsari, M. M. "Viscosity wedge effect of dimpled surfaces considering cavitation effect", Tribol. Int., Vol.122, pp.58-66, 2018.   DOI
7 ANSYS, ANSYS Fluent, Release 2019 R2: User Guide, ANSYS Inc., Canonsburg, USA., 2019.
8 Park, T. J., Kim, M. G., "Effect of film-temperature boundary conditions on the lubrication performance of parallel slider bearing", J. Korean Soc. Tribol. Lubr. Eng., Vol.33, No.5, pp.207-213, 2017, https://doi.org/10.9725/kstle.2017.33.5.207   DOI
9 Dobrica, M. B., Fillon, M., "Thermohydrodynamic behavior of a slider pocket bearing", ASME J. Tribol., Vol.128, No.2, pp.312-318, 2006.   DOI
10 Szeri, A.Z., "Some extensions of the lubrication theory of Osborne Reynolds", ASME J. Tribol., Vol.109, No.1, pp.21-36, 1987.   DOI
11 Cameron, A., "The viscosity wedge", ASLE Trans., Vol.1, No.2, pp.248-253, 1958.   DOI
12 Gropper, D., Wang, L., Harvey, T. J., "Hydrodynamic lubrication of textured surfaces: A review of modeling techniques and key findings", Tribol. Int., Vol.94, pp.509-529, 2016.   DOI
13 Brizmer, V., Kligerman, Y., Etsion, I., "A laser surface textured parallel thrust bearing", Tribol. Trans., Vol.46, No.3, pp.397-403, 2003.   DOI
14 Fowell, M., Olver, A. V., Gosman, A. D., Spikes, H. A., Pegg, I., "Entrainment and inlet suction: Two mechanisms of hydrodynamic lubrication in textured bearings", ASME J. Tribol., Vol.129, No.2, pp.221-230, 2007.   DOI
15 Pascovici, M. D., Cicone, T., Fillon, M., Dobrica, M. B., "Analytical investigation of a partially textured parallel slider", Proc. Inst. Mech. Eng. Part J: J. Eng. Tribol., Vol.223, No.2, pp.151-158, 2009.
16 Khonsari, M. M., "A review of thermal effects in hydrodynamic bearings. Part I: Slider and thrust bearings", ASLE Trans., Vol.30, No.1, pp.19-25, 1987.   DOI
17 Park, T. J., Kim, M. G., "Thermohydrodynamic lubrication analysis of surface-textured parallel slider bearing: Effect of dimple depth", J. Korean Soc. Tribol. Lubr. Eng., Vol.33, No.6, pp.288-295, 2017, https://doi.org/10.9725/kstle.2017.33.6.288   DOI
18 Cui, J., Kaneta, M., Yang, P., Yang, P., "The relation between thermal wedge and thermal boundary conditions for the load-carrying capacity of a rectangular pad and a slider with parallel gaps", ASME J. Tribol., Vol.138, No.2, p.024502, 2016.   DOI
19 Jeong, Y., Park, T., "THD analysis of surface textured parallel thrust bearing: Effect of dimple radius and depth", J. Korean Soc. Tribol. Lubr. Eng., Vol.30, No.5, pp.303-310, 2014, http://dx.doi.org/10.9725/kstle.2014.30.5.303   DOI