Effect of perturbation amplitudes on water film stiffness coefficients of water-lubricated plain journal bearings based on CFD–FSI methods

Liang, Xingxin; Liu, Zhenglin; Ouyang, Wu

doi:10.1177/1350650118818027

Cited by 11 publications

(5 citation statements)

References 30 publications

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“…Xiong et al [5] investigated the influence of the amplitude of perturbation on the stiffness and damping coefficients. Taking the deformation of the bearing bush into account, Liang et al [6] studied the influence of disturbance amplitude on the stiffness coefficients of water-lubricated cylindrical bearings. Ren and Feng [7] calculated the instability speed of journal bearings used for air compressors in differently structured fuel cell vehicles.…”

Section: Introductionmentioning

confidence: 99%

Stability Analysis of the Rotor-Journal Bearing System Considering Shear and Gaseous Cavitation

Sun,

Shi,

Jiang

et al. 2024

Lubricants

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Part of the gas phase within the bearing emanates from the gaseous lubricating medium generated by the phase transition of the liquid lubricant under low pressure, while the remaining portion originates from the expansion of gases, such as air, present in the lubricant. This study delves into the impact of vapor and gas cavitation on the stability of the rotor-journal bearing system. Utilizing computational fluid dynamics (CFD), a 3D transient lubrication model is developed for the rotor-journal bearing system. This model integrates a combined cavitation approach, encompassing both vaporous and gaseous cavitation phenomena. Based on a new structured dynamic mesh method, the journal orbits are obtained when the journal moves in the rotor-journal bearing system. In vaporous and gaseous cavitation, shear stress and non-condensable gases (NCG) are incorporated successively. Compared with the combined cavitation model, the basic cavitation model journal orbit amplitude is significantly larger than the combined cavitation model. The carrying capacity of journal bearings under the basic cavitation model is overestimated, leading to a more conservative prediction for system stability.

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Section: Introductionmentioning

confidence: 99%

Stability Analysis of the Rotor-Journal Bearing System Considering Shear and Gaseous Cavitation

Sun,

Shi,

Jiang

et al. 2024

Lubricants

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“…In these studies mentioned earlier, the structure deformation (shaft and bearing) was neglected. It is crucial to evaluate the interaction effects of fluid and structure, as discussed by the recent literature, for example in [33][34][35][36]. It was revealed that the bearing deformation has a great effect on the tribological characteristics of lubricated journal bearing, and this effect cannot be ignored.…”

Section: Introductionmentioning

confidence: 99%

Performance Comparison of Newtonian and Non-Newtonian Fluid on a Heterogeneous Slip/No-Slip Journal Bearing System Based on CFD-FSI Method

Tauviqirrahman

Jamari

Susilowati

et al. 2022

Fluids

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It is a well-known fact that incorporating a slip boundary into the contact surfaces improves bearing performance significantly. Regrettably, no research into the effect of slip on the behavior of journal bearing systems operating with non-Newtonian lubricants has been conducted thus far. The main purpose of this work is to explore the performance comparison of Newtonian and non-Newtonian fluid on a heterogeneous slip/no-slip journal bearing system. The tribological and acoustic behavior of journal bearing is investigated in this study using a rigorous program that combines CFD (computational fluid dynamics) and two-way FSI (fluid–structure interaction) procedures to simulate Newtonian vs. non-Newtonian conditions with and without slip boundary. The numerical results indicate that irrespective of the lubricant type (i.e., Newtonian or non-Newtonian), an engineered heterogeneous slip/no-slip pattern leads to the improvement of the bearing performance (i.e., increased load-carrying capacity, reduced coefficient of friction, and decreased noise) compared to conventional journal bearing. Furthermore, the influence of the eccentricity ratio is discussed, which confirms that the slip beneficial effect becomes stronger as the eccentricity ratio decreases. It has also been noticed that the Newtonian lubricant is preferable for improving tribological performance, whereas non-Newtonian fluid is recommended for lowering bearing noise.

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“…Their main findings indicated that solid deformation affects the flow behavior of the bearing. Recently, Liang et al [17] based on the CFD-FSI method showed that the journal's attitude angle changes due to bearing deformation.…”

Section: Introductionmentioning

confidence: 99%

Elastohydrodynamic behavior analysis on water-lubricated journal bearing: a study of acoustic and tribological performance based on CFD-FSI approach

Tauviqirrahman

Jamari

Bagir

et al. 2021

J Braz. Soc. Mech. Sci. Eng.

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Most of the studies with respect to the use of water-lubricated journal bearing are mainly concerned with tribological performance, whereas few studies explore the noise characteristics of such bearing. In this study, the tribological and acoustic behavior of water-lubricated journal bearing is studied using a rigorous program containing combined CFD and two-way FSI procedures for simulating elastohydrodynamic simulation for a range of different bearing materials. To model cavitation in the bearing, the multiphase flow mixture model is employed, while acoustical properties are investigated through broadband noise source models. The numerical results demonstrate that the bearing deformation has a great effect on the tribological characteristics of water-lubricated journal bearing, and this effect cannot be ignored, especially in the case of bearing material with a low elasticity modulus. The results also indicate that the bearing noise is weakly sensitive to the bearing material employed. Furthermore, the effect of operating conditions such as rotational speed and eccentricity ratio on the acoustic and tribological indices are also discussed in detail.

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Effect of perturbation amplitudes on water film stiffness coefficients of water-lubricated plain journal bearings based on CFD–FSI methods

Cited by 11 publications

References 30 publications

Stability Analysis of the Rotor-Journal Bearing System Considering Shear and Gaseous Cavitation

Stability Analysis of the Rotor-Journal Bearing System Considering Shear and Gaseous Cavitation

Performance Comparison of Newtonian and Non-Newtonian Fluid on a Heterogeneous Slip/No-Slip Journal Bearing System Based on CFD-FSI Method

Elastohydrodynamic behavior analysis on water-lubricated journal bearing: a study of acoustic and tribological performance based on CFD-FSI approach

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