Co-optimization for hydrodynamic lubrication and leakage of V-shape textured bearings via linear weighting summation

Guo, Juan; Ding, Bo; Wang, Yifei; Han, Yanfeng

doi:10.1088/1402-4896/ad07be

Cited by 34 publications

(5 citation statements)

References 38 publications

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“…3D Reynolds time-averaged Navier-Stokes (NS) equations are solved using the SST k-ω turbulence model in commercial CFD software ANSYS CFX 2020 R2 (Guo et al, 2023;Tang et al, 2024). The gas-liquid two-phase medium is pure water (water) and air (air at 25 °C).…”

Section: Boundary Condition Settingmentioning

confidence: 99%

Effect of the impeller blade outlet setting angle on the performance of the helical axial-flow multiphase pump

Wang,

Hu,

Bai

et al. 2024

Front. Energy Res.

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As one of the core pieces of equipment in the multiphase mixing system, the helical axial-flow multiphase pump plays a vital role in the process of offshore oil extraction. In order to explore the influence of the impeller blade outlet setting angle on the internal flow of the helical axial-flow multiphase pump, this paper increases the outlet setting angle of the flow surface by −3°, −1.5°, and 1.5°, respectively, based on the original multiphase pump. It calculates the flow characteristics of the impeller with four different outlet setting angles (including the original impeller) under the design condition with different inlet gas volume fractions (GVFs = 0, 10%, 30%, 50%, and 70%) by adopting the Euler–Euler non-homogeneous flow model and SST k-ω turbulence model. Furthermore, it compares its external characteristic curve and the internal pressure, velocity, gas distribution, and other rules of change of the impeller and guide vane under higher inlet GVF conditions (50%). The results show that in the pure water state, increasing the outlet setting angle appropriately can enhance both the pressure pressurization capability and efficiency of the helical axial-flow multiphase pump; the pressure pressurization capability and efficiency of each scheme decrease with an increase in inlet GVF, and at 50%–70% inlet GVF, the option of increasing the outlet setting angle by −1.5° is better; as the blade outlet setting angle decreases, the axial cross-sectional pressure after gas–liquid mixing increases, the overall velocity distribution is more uniform, and the vortex formed due to the counter-pressure flow in the secondary guide vane is reduced; the accumulation of gas phase on the backside of the impeller and guide vanes improves, leading to a reduction in flow losses.

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Section: Boundary Condition Settingmentioning

confidence: 99%

Effect of the impeller blade outlet setting angle on the performance of the helical axial-flow multiphase pump

Wang,

Hu,

Bai

et al. 2024

Front. Energy Res.

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“…Most scholarly studies on journal shape errors have primarily focused on types such as aerostatic bearings [17][18][19], hydrostatic bearings [20], and hybrid journal bearings [21]. The parameters studied in the literature include journal roughness [22], journal waviness [23][24][25], journal roundness error [26], journal misalignment (wear, texture, profile modifications) [27][28][29], etc. Among them, Minseok et al [17] investigated the dynamic behavior and time-frequency properties of gas cylindrical journal bearings in the presence of shape errors in both journals and bearings.…”

Section: Introductionmentioning

confidence: 99%

Thermal Tribo-Dynamic Behaviors of Water-Lubricated Bearings during Start-Up with Journal Shape Error

Chen,

Cai,

Zhang

et al. 2024

Lubricants

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In practical scenarios, journal bearings often exhibit shape errors due to machining imperfections and operational wear. These deviations from perfect roundness can significantly impact the performance of journal bearings during start-up. This study investigates the impact of journal shape errors on transient mixed lubrications, such as water film temperature and asperity contact, as well as on the rotor dynamics of water-lubricated bearings (WLB) at start-up. The simulation results of the developed numerical model are compared with the experimental data from existing studies to verify their accuracy. Following this validation, parametric analyses are conducted using the model. The analytical results indicate that journal shape error increases the temperature rise of the water-lubricated bearing system during start-up. The greater the error in journal shape, the higher the temperature rise, both in terms of shape amplitude and waviness order. Interestingly, the thermal deformation caused by the temperature effect decreases the vertical displacement during start-up. The study also finds that higher start-up speeds lead to quicker temperature increases when shape errors are present. However, these speeds enable the bearing to more rapidly reach the elastohydrodynamic lubrication (EHL) stage, where the temperature rise stabilizes. Therefore, start-up speeds must be carefully selected.

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“…Yang et al [4] investigated the mechanism of amorphous wrapped nanolamellar heterostructure in the frictional self-lubricating behavior of pearlitic steel through experiments and molecular dynamics (MD) simulations. Guo et al [5] optimized the V-shape textured bearings through the linear weighting summation method to improve the overall performance under fluid lubrication.…”

Section: Introductionmentioning

confidence: 99%

Effect of Sodium Alkane Sulfonate Addition on Tribological Properties of Emulsion for Cold Rolling Strips: Experimental and Simulation Investigations

Su,

Sun,

Meng

et al. 2024

Lubricants

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Cold rolling emulsion contains a variety of functional additives, which often exhibit complex interactions with each other. Sodium alkane sulfonate (SAS) is a common corrosion inhibitor used in cold rolling emulsions for temporary rust prevention. In this study, it was found that SAS would deteriorate the tribological properties of the emulsion. Emulsions containing SAS and different friction modifiers were prepared. Tribology tests were carried out on a four-ball friction and wear tester. White light interferometer was used to investigate the 3D morphology of the friction surface and wear volume. Microscopic morphology of friction surfaces was observed using a scanning electron microscope (SEM). The chemical activity and electrostatic potential of the molecules were calculated based on density functional theory (DFT). The adsorption energies of additives on metal surfaces were calculated via molecular dynamics (MD) simulation. The results indicate that the strong electrostatic force gives SAS an advantage in competitive adsorption with ester friction modifiers due to the positive charge on the metal surface. This results in the friction modifier not functioning properly and the tribological properties of the emulsion being significantly reduced.

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Co-optimization for hydrodynamic lubrication and leakage of V-shape textured bearings via linear weighting summation

Cited by 34 publications

References 38 publications

Effect of the impeller blade outlet setting angle on the performance of the helical axial-flow multiphase pump

Effect of the impeller blade outlet setting angle on the performance of the helical axial-flow multiphase pump

Thermal Tribo-Dynamic Behaviors of Water-Lubricated Bearings during Start-Up with Journal Shape Error

Effect of Sodium Alkane Sulfonate Addition on Tribological Properties of Emulsion for Cold Rolling Strips: Experimental and Simulation Investigations

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