Characteristic times in transient thermal elastohydrodynamic line contacts |
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| Affiliation: | 1. Université de Lyon, INSA Lyon, CNRS, LaMCoS, UMR5259, F-69621, Villeurbanne, France;2. Total Marketing Services, Centre de Recherche de Solaize, BP 22, Chemin du Canal, 69360 Solaize, France;1. School of Mechanical and Manufacturing Engineering, UNSW Australia, Sydney, NSW 2052, Australia;2. Theory of Lubrication and Bearing Institute, Xi’an Jiaotong University, Xian 710049, China;1. College of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China;2. State Key Laboratory for High Performance Complex Manufacturing, Central South University, Changsha 410083, China |
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| Abstract: | For practical applications, there are several points of interest in the numerical simulation of transient Thermal Elastohydrodynamic (TEHD) lubrication. Among others, is the possibility to investigate the impact of transient effects depending on the dynamic characteristics of the contact. In this regard, the paper presents an original study on the characteristic times involved in a generic line contact lubricated with a non-Newtonian fluid. The paper highlights the dependency of the dominant heat transfer mode on the Slide-to-Roll Ratio (SRR), leading to the formulation of new thermal characteristic times. Based on results from time-dependent computations, it also provides a criterion linking the onset of transient effects to the dominant thermal characteristic time which has been validated on various operating conditions. |
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| Keywords: | Transient effects competition Characteristic times Line contacts Thermal Elastohydrodynamic (TEHD) simulation |
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