Stochastic models for turbulent lubrication of bearing with rough surfaces

Zhu, Shaoyu; Sun, Jun; Li, Biao; Zhao, Xilu; Wang, Hu; Teng, Quincy; Ren, Yan-Xia; Zhu, Guangcan

doi:10.1016/j.triboint.2019.03.063

Cited by 25 publications

(15 citation statements)

References 40 publications

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“…In order to verify the accuracy of the present model, the calculation results of opening force are compared with the Brunetiere et al 19 The following equation (10) is the governing equation of liquid lubricated mechanical seal considering turbulence, and equation ( 10) is solved by the finite difference method. 28 1 r @ @h…”

Section: Verification Of Turbulence Transition Factormentioning

confidence: 99%

“…In addition, turbulent flow regime can also occur when mechanical seals or bearings are lubricated with water. [8][9][10][11][12] Rouillon and Bruneti ere 8 conducted experiments to investigated the behavior and performance of a spiral groove mechanical face seal, and the turbulent flow was observed. Zhu et al 10,11 studied the variations for turbulent lubrication performance of journal bearing.…”

Section: Introductionmentioning

confidence: 99%

“…[8][9][10][11][12] Rouillon and Bruneti ere 8 conducted experiments to investigated the behavior and performance of a spiral groove mechanical face seal, and the turbulent flow was observed. Zhu et al 10,11 studied the variations for turbulent lubrication performance of journal bearing. Lin et al 12 analyzed the static characteristics of the water-lubricated spiral groove thrust bearing and pointed out that the loadcarrying capacity and friction torque increase due to turbulence.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Quantitative analysis method for laminar-turbulence transition process of mechanical seal by a catastrophic model

Wang

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part C:

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Fluid flow regime has an important influence on the lubrication performance of mechanical seal. A novel method is proposed to analyze the flow regime transition quantitatively based on a cusp catastrophic model with dimensionless analysis. Furthermore, from this method, a turbulence transition factor is derived strictly to describe the turbulent transition process of mechanical seal, which is verified by the published results. Then this factor is applied to hydrodynamic lubrication mechanical seal to analyze the influence of flow regime on sealing performance. The results indicate that the performance parameters of mechanical seal are greatly influenced by the transition of fluid flow regime, and the stability of mechanical seal decreases in the transition to turbulent flow. The novel method of flow regime transition analysis provides a new insight into the turbulence model.

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Section: Verification Of Turbulence Transition Factormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Quantitative analysis method for laminar-turbulence transition process of mechanical seal by a catastrophic model

Wang

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…The results show that the directional orientation of the surface roughness could affect the performance of a bearing significantly. Based on the stochastic method and the Ng-Pan turbulent model, Zhu et al [14] calculated the turbulent lubrication performance of a journal bearing with an isotropic rough surface. Kim et al [15] proposed an approach with both stochastic and contact characteristics to evaluate the effects of surface roughness for a slider bearing operating under partial or boundary lubrication, and found that the influence of roughness parameters on friction and load capacity increased rapidly upon the application of asperities contact.…”

Section: Introductionmentioning

confidence: 99%

Rotation Accuracy Analysis of Aerostatic Spindle Considering Shaft’s Roundness and Cylindricity

Zhang

Zheng

et al. 2021

Applied Sciences

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The rotation accuracy of the aerostatic spindle can easily be affected by shaft shape errors due to the small gas film clearance. Thus, the main shaft shape errors with the largest scale—that is, the roundness and cylindricity errors—are studied in this paper, and a dynamic mathematical model is established with the consideration of the roundness, cylindricity errors, and spindle speed. In order to construct the shaft model, the discrete coefficient index of the shaft radius based on roundness measurement data are proposed. Then, the simulation calculations are conducted based on the measured cylindricity data and the constructed shaft model. The calculation results are compared with the spindle rotation accuracy measured using the spindle error analyzer. The results show that the shaft with a low discrete coefficient is subjected to less unbalanced force and smaller rotation errors, as obtained by the experiment.

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“…Turbulent lubrication has drawn the attention of many researchers. [18][19][20][21][22][23] Some turbulence models for bearings and seals have been developed, including the Constantinescu model, 24 Ng-Pan model, 25,26 Elrod-Ng model, 27 bulk flow model proposed by Hirs, 28,29 and the most commonly used Ng-Pan model. Lv et al 30,31 analyzed the influence of turbulence on misaligned bearing by the Ng-Pan model.…”

Section: Introductionmentioning

confidence: 99%

Influence of turbulent cavitating flow on performance characteristics of spiral groove liquid film seal

Wang

2021

Proceedings of the Institution of Mechanical Engineers, Part J:

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Spiral groove liquid film seal is expected to be the prime candidate for application to high-speed liquid-oxygen turbopumps, and the lubricant flow between the sealing faces is turbulent due to the liquid-oxygen properties and the working conditions. Based on the Ng–Pan model and mass-conserving algorithm, the modified dynamic Reynolds equation considering flow regime and cavitation is obtained, which is solved by the finite-difference method. The effects of flow regime and cavitation on the performance of spiral groove liquid film seal are analyzed. The results indicate that the balanced film thickness and opening force increase due to the turbulent flow. The cavitation ratio increases in the laminar–turbulent transition region, which reduces the opening force and liquid film stiffness.

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Stochastic models for turbulent lubrication of bearing with rough surfaces

Cited by 25 publications

References 40 publications

Quantitative analysis method for laminar-turbulence transition process of mechanical seal by a catastrophic model

Quantitative analysis method for laminar-turbulence transition process of mechanical seal by a catastrophic model

Rotation Accuracy Analysis of Aerostatic Spindle Considering Shaft’s Roundness and Cylindricity

Influence of turbulent cavitating flow on performance characteristics of spiral groove liquid film seal

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