Compressible high-pressure lubrication flows in thrust bearings

Chien, Ssu-Ying; Cramer, M. S.

doi:10.1017/jfm.2022.240

Cited by 3 publications

(1 citation statement)

References 29 publications

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“…Venerus DC analyzed the squeeze flow in the lubricating oil film between the porous disk and the impermeable disk of the bearing caused by the relative motion of the disk, and found the analytical solution of the coupling equations controlling the flow in the lubricating oil film and the porous disk [8]. Chien SY proposed the detailed derivation of the Reynolds equation and its corresponding energy equation for the three-dimensional, stable, laminar and compressible flow of single-phase Navi-Stokes fluid in thrust bearings [9]. Tomar AK numerically analyzed the synergistic effect of groove geometry and lubricant nonlinear behavior on 4-cavity spherical radial bearing [10].…”

Section: Introductionmentioning

confidence: 99%

Research on the dynamic pressure effect of clearance oil film of stepped hydrostatic thrust bearing

Feng

Jiang

et al. 2023

Preprint

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The dynamic pressure effect of the clearance oil film of stepped hydrostatic thrust bearing is studied by taking the double rectangular cavity oil cushion as an example. According to the hydrodynamics theory, the average dynamic pressure of lubricating oil film in different clearance height regions is theoretically deduced and calculated, and the dynamic pressure effect of the clearance oil film in the stepped hydrostatic thrust bearing is studied through the combination of theoretical calculation, simulation, and experimental verification. It is found that the theoretical value of the average dynamic pressure of the clearance oil film and the rotational speed show a linear growth relationship with a slope of 275.2. The simulated value of the average dynamic pressure and the rotational speed follow the growth law of the Fourier 1 model. The experimental value of the average dynamic pressure is between the theoretical value and the simulated value, which is basically not affected by the load. In the speed range of 0r/min-200r/min, compared with the viscosity of lubricating oil, the speed is the main factor affecting the dynamic pressure of the oil film of the stepped hydrostatic thrust bearing. The dynamic pressure value of the clearance oil film increases in a stepped fashion along the radial direction of the double rectangular cavity oil cushion. The dynamic pressure value has an obvious upward trend at the junction of the circumferential right oil cavity and the sealing edge and then decreases to 0 after reaching the peak value.

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Section: Introductionmentioning

confidence: 99%

Research on the dynamic pressure effect of clearance oil film of stepped hydrostatic thrust bearing

Feng

Jiang

et al. 2023

Preprint

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Flow and thermo-hydrodynamic characteristics in supercritical CO2 lubrication

Xiong,

Xu,

Chen

2024

Applied Thermal Engineering

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Characterizing and predicting the partial slip subjected to variable gradients of velocity and pressure in eccentric micro-scale Taylor–Couette flows

Sun,

Lyu,

Zhang

et al. 2024

Physics of Fluids

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In the context of eccentric micro-scale Taylor–Couette flow, variations in localized flow scales result in a non-uniform fluid–solid interface slip state, distinct from the typically studied uniform slip velocity distribution. This study introduces a boundary condition definition method aimed at characterizing partial slip states, complemented by a coupled iterative analysis system tailored to address this complexity. Key contributions include the development of a method for calculating the limiting shear stress, which considers local velocity gradients and pressures. Validation demonstrates that the locally derived slip state aligns more closely with Knudsen number distributions of local flow scales compared to traditional uniform slip models, and exhibits greater consistency with experimentally measured pressure distributions. Additionally, the study reveals that eccentric Taylor–Couette flow, characterized by significant variations in local flow scales and strong self-induced pressure effects, leads to complex distributions of local pressure, velocity gradients, and differences in local slip velocities. Specifically, the non-uniform distribution of local pressure gradients due to eccentricity results in partial slip occurring predominantly on the rotor in regions with positive pressure gradients, and on the stator in regions with negative pressure gradients. Furthermore, the variation in gap height exerts a greater influence on local slip compared to rotational speed and eccentricity ratio. Under certain conditions influenced by pressure gradients, the slip velocity on the rotor may exceed its tangential speed.

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Compressible high-pressure lubrication flows in thrust bearings

Cited by 3 publications

References 29 publications

Research on the dynamic pressure effect of clearance oil film of stepped hydrostatic thrust bearing

Research on the dynamic pressure effect of clearance oil film of stepped hydrostatic thrust bearing

Flow and thermo-hydrodynamic characteristics in supercritical CO2 lubrication

Characterizing and predicting the partial slip subjected to variable gradients of velocity and pressure in eccentric micro-scale Taylor–Couette flows

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