Experimental and numerical study on cavitation under elastohydrodynamic lubrication point contact

Ma, Mingfei; Wang, Wen; Jiang, Wenxun

doi:10.1177/13506501211052773

Cited by 2 publications

(2 citation statements)

References 28 publications

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“…40 The cavitation pressure is polynomial fitted as a function of temperature by data obtained from the REFPROP V7.0 database. As shown in equation (10):…”

Section: Discussion and Analysis Of Resultsmentioning

confidence: 99%

“…Ma et al used an infrared thermal camera to observe cavitation in bearings. 10 The effect of cavitation on the integrity of the oil film in the contact area is studied. The visualization test rig for water-lubricated SGTBs is built by Lin et al 11 The cavitation morphology and bubble distribution are studied by high-speed photography technology.…”

Section: Introductionmentioning

confidence: 99%

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Structural selection of liquid hydrogen lubricated herringbone spiral-grooved thrust bearing considering viscous dissipative heat

Yan

Lai

Liu

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part J:

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Spiral-grooved thrust bearing (SGTB) is one of the important kinds of supporting component in high-speed rotating devices. The high shearing rate of SGTB can produce a large amount of viscous dissipative heat, which causes a temperature rise. Dynamic pressure effect induces pressure variation in the herringbone SGTB (HSGTB). When liquid hydrogen (LH2) is used as a lubricant, cavitation caused by lower pressure and higher temperature can result in lubrication failure. Especially, the cavitation of LH2 is more prone to occur because of its small temperature difference between the triple point and critical point, and the smaller supercooling degree. The influence of thermal properties on the phase transition process of LH2 is more significant. In this paper, the thermal and mechanical performance of three different structures of LH2 lubricated SGTB is compared by considering viscous dissipative heat. Herringbone SGTB is proposed for better performance and feasibility of its application in LH2 lubrication. The static performances of HSGTB such as load capacity, friction torque, cavitation rate, average temperature, and heat flux have been evaluated numerically by introducing the cryogenic cavitation model. The orthogonal sampling method and range analysis are used to optimize the HSGTB structure. Compared with the original HSGTB, cavitation rate and temperature rise are significantly suppressed in the optimized HSGTB. In addition, the load capacity is also improved effectively at high rotational speed, which is expected to be applied to high-speed centrifugal pumps.

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“…40 The cavitation pressure is polynomial fitted as a function of temperature by data obtained from the REFPROP V7.0 database. As shown in equation (10):…”

Section: Discussion and Analysis Of Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Structural selection of liquid hydrogen lubricated herringbone spiral-grooved thrust bearing considering viscous dissipative heat

Yan

Lai

Liu

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part J:

View full text Add to dashboard Cite

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Fluid–Solid Interaction Modeling of Elastohydrodynamic Lubrication Point Contacts

Peterson

Singh

Sadeghi

2022

Journal of Tribology

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Elastohydrodynamically lubricated point contact was investigated using a two-way partitioned fluid-solid interaction (FSI) model. Ansys Mechanical finite element modelling software was used to compute elastic (and plastic) deformation of the solid bodies, while Ansys Fluent computational fluid dynamics software was used to model the fluid with the Navier-Stokes equations. The current model is not limited by Reynolds equation assumptions, allowing for the investigation of pressure, viscosity and temperature variation across point contact elastohydrodynamic lubrication (EHL) films. Solid body material stress distribution and fluid behavior such as cavitation were also investigated. The details of model development are described. Validation of the model is presented across a range of loads and speeds for cases when the Reynolds equation is applicable. The results are in excellent agreement. Various slide-to-roll ratios were investigated considering a non-Newtonian fluid with thermal effects to characterize lubricant properties within the EHL film. Results demonstrate notable lubricant viscosity and temperature variations within the EHL film thickness both along and perpendicular to the rolling direction for cases with high slide to roll ratio. Cavitation was also considered and cavitation bubble lengths were found to agree well with results found in open literature. Finally, the effects of material plasticity on solid body response were investigated. The FSI model developed in this research provides new insights on a classical EHL problem.

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Experimental and numerical study on cavitation under elastohydrodynamic lubrication point contact

Cited by 2 publications

References 28 publications

Structural selection of liquid hydrogen lubricated herringbone spiral-grooved thrust bearing considering viscous dissipative heat

Structural selection of liquid hydrogen lubricated herringbone spiral-grooved thrust bearing considering viscous dissipative heat

Fluid–Solid Interaction Modeling of Elastohydrodynamic Lubrication Point Contacts

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