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A Thermal Equilibrium Analysis of Line Contact Hydrodynamic Lubrication Considering the Influences of Reynolds Number, Load and Temperature.

Yu X, Sun Z, Huang R, Zhang Y, Huang Y - PLoS ONE (2015)

Bottom Line: These variations have caused some inconsistencies in the conclusions of different researchers regarding the relative contributions of these thermal effects.The results indicate that the contribution of each thermal effect sharply varies with the Reynolds number and temperature.Convective effect could be dominant under certain conditions.

View Article: PubMed Central - PubMed

Affiliation: Department of Energy Engineering, Zhejiang University, Hangzhou, 310027, China.

ABSTRACT
Thermal effects such as conduction, convection and viscous dissipation are important to lubrication performance, and they vary with the friction conditions. These variations have caused some inconsistencies in the conclusions of different researchers regarding the relative contributions of these thermal effects. To reveal the relationship between the contributions of the thermal effects and the friction conditions, a steady-state THD analysis model was presented. The results indicate that the contribution of each thermal effect sharply varies with the Reynolds number and temperature. Convective effect could be dominant under certain conditions. Additionally, the accuracy of some simplified methods of thermo-hydrodynamic analysis is further discussed.

No MeSH data available.


Comparison between experimental data and numerical results.
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pone.0134806.g006: Comparison between experimental data and numerical results.

Mentions: The experimental conditions, which were also applied in the calculation, are shown in Table 5. Fig 6 shows the comparison between the experimental data and the numerical results for δ0 and Qvis. The trends and the values agree well. The difference between the experimental data and the numerical results is less than ±13%, except for #1, #4 and #7, which might be caused by vibration of the working flywheel at specific speeds. The experiment data verified the credibility of the simulation model, thus this simulation model was adopted in the following studies.


A Thermal Equilibrium Analysis of Line Contact Hydrodynamic Lubrication Considering the Influences of Reynolds Number, Load and Temperature.

Yu X, Sun Z, Huang R, Zhang Y, Huang Y - PLoS ONE (2015)

Comparison between experimental data and numerical results.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4526673&req=5

pone.0134806.g006: Comparison between experimental data and numerical results.
Mentions: The experimental conditions, which were also applied in the calculation, are shown in Table 5. Fig 6 shows the comparison between the experimental data and the numerical results for δ0 and Qvis. The trends and the values agree well. The difference between the experimental data and the numerical results is less than ±13%, except for #1, #4 and #7, which might be caused by vibration of the working flywheel at specific speeds. The experiment data verified the credibility of the simulation model, thus this simulation model was adopted in the following studies.

Bottom Line: These variations have caused some inconsistencies in the conclusions of different researchers regarding the relative contributions of these thermal effects.The results indicate that the contribution of each thermal effect sharply varies with the Reynolds number and temperature.Convective effect could be dominant under certain conditions.

View Article: PubMed Central - PubMed

Affiliation: Department of Energy Engineering, Zhejiang University, Hangzhou, 310027, China.

ABSTRACT
Thermal effects such as conduction, convection and viscous dissipation are important to lubrication performance, and they vary with the friction conditions. These variations have caused some inconsistencies in the conclusions of different researchers regarding the relative contributions of these thermal effects. To reveal the relationship between the contributions of the thermal effects and the friction conditions, a steady-state THD analysis model was presented. The results indicate that the contribution of each thermal effect sharply varies with the Reynolds number and temperature. Convective effect could be dominant under certain conditions. Additionally, the accuracy of some simplified methods of thermo-hydrodynamic analysis is further discussed.

No MeSH data available.