Theoretical and Experimental Research on Elastohydrodynamic Lubrication of Non-Newtonian Fluids in Point Contact

被引：0

作者：

Huang P. ^{[1
]}

Yuan J. ^{[1
]}

机构：

[1] School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou, 510640, Guangdong

来源：

Huanan Ligong Daxue Xuebao/Journal of South China University of Technology (Natural Science) | 2019年 / 47卷 / 03期

基金：

中国国家自然科学基金;

关键词：

Entrainment velocity; Non-Newtonian fluid; Point contact; Rheological index;

D O I：

10.12141/j.issn.1000-565X.180252

中图分类号：

学科分类号：

摘要：

In order to study the elastohydrodynamic lubrication characteristics of power function non-Newtonian fluids under isothermal conditions, based on the Ostwald constitutive model, the non-Newtonian fluid lubrication problem was solved with the universal fluid lubrication equation. The effects of parameters such as rheological index, load, and entrainment velocity on the point contact EHL under isothermal and steady state conditions were discussed. A comparison between the non-Newtonian fluid and the Newtonian fluid was made. Then, the film thickness was measured by elastohydrodynamic lubrication experiment with a certain rheological index, and the effect of the entrainment velocity and the load on the film thickness was analyzed. The results show that when the non-Newtonian properties of the lubricant are more significant, the lubricant film will become less thick, and the pressure distribution will be closer to the Hertz contact stress distribution, and the influence of the load and the entrainment velocity on the lubricant film thickness pressure distribution of non-Newtonian fluids will be smaller than that on the Newtonian fluids. Under the same conditions, the film thickness of non-Newtonian fluid is smaller than that of the Newtonian fluid. From the comparison of the experimental measurement results with the numerical calculation results, it can be concluded that the effect of the entrainment velocity and load on the film thickness is basically consistent. © 2019, Editorial Department, Journal of South China University of Technology. All right reserved.

引用

页码：37 / 43

页数：6

共 12 条

[1] Wang X., Liu Y., Zhu D., Numerical solution of mixed thermal elastohydrodynamic lubrication in point contacts with three-dimensional surface roughness, Journal of Tribology, 139, 1, (2017)
[2] Cui J., Yang P., Yang P., Analysis of thermal effect and non-Newtonian effect based on transient elastohydrodynamic lubrication, Lubrication Engineering, 38, 2, pp. 18-22, (2013)
[3] Lugt P.M., Morales-Espejel G.E., A review of elasto-hydrodynamic lubrication theory, Tribology Transactions, 54, 3, pp. 470-496, (2011)
[4] Bair S., Qureshi F., The generalized Newtonian fluid model and elastohydrodynamic film thickness, Journal of Tribology, 125, 1, pp. 70-75, (2003)
[5] Esfe M.H., Rostamian H., Non-Newtonian power-law behavior of TiO2/SAE 50 nano-lubricant: an experimental report and new correlation, Journal of Molecular Liquids, 232, 4, pp. 219-225, (2017)
[6] Liu X., Yang P., Analysis of power law non-Newtonian fluid lubrication in the isothermal EHL line contact, Lubrication Engineering, 1, pp. 5-6, (2002)
[7] Yang Y., Liu X., Xin Z., Analysis of EHL characteristics of non-Newtonian fluid under isothermal condition, Lubrication Engineering, 42, 7, pp. 48-53, (2017)
[8] Yang P., Wen S., A generalized Reynolds equation for non-Newtonian thermal elastohydrodynamic lubrication, Journal of Tribology, 112, 4, pp. 631-636, (1990)
[9] Zeeb B., Gibis M., Fischer L., Et al., Influence of interfacial properties on Ostwald ripening in crosslinked multilayered oil-in-water emulsions, Journal of Colloid and Interface Science, 387, pp. 65-73, (2012)
[10] Yang Q., Huang P., Fang Y., A novel Reynolds equation of non-Newtonian fluid for lubrication simulation, Tribology International, 94, 2, pp. 458-463, (2016)

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