CFD Analysis of Journal Bearing with a Heterogeneous Rough/Smooth Surface

Tauviqirrahman, Mohammad; Jamari, J.; Wicaksono, Arjuno Aryo; Muchammad, Muchammad; Susilowati, Sri Sutji; Ngatilah, Yustina; Pujiastuti, Caecilia

doi:10.3390/lubricants9090088

Cited by 15 publications

(13 citation statements)

References 30 publications

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“…Many studies have been conducted on the drawbacks that a rough surface has on the lubrication regime, while some researchers even investigated certain conditions under which a surface roughness arrangement could be beneficial. Tauviqirrahman et al [4,5] studied the possibility of utilizing a heterogenous rough/smooth surface profile, which would provide superior tribological properties compared to the equivalent homogenous smooth or rough bearing.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Cavitated Flow in Water-Lubricated Bearings Considering Surface Roughness, Thermal, and Elastic Effects

Charamis,

Nikolakopoulos

2024

Lubricants

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Contrary to conventional journal bearings, which operate using oil-based substances, water-lubricated bearings (WLBs) utilize water and, thus, constitute a more environmentally responsible solution. The shipping industry, among others, as already been introduced to this technology with a lot of commercial ships using water-lubricated stern tube systems; in other cases, hydropower plants manage to keep up with the strict environmental regulations by implementing the use of WLBs in water turbines. However, there are a lot of challenges when it comes to transitioning from conventional bearings to water-based ones. Such challenges are caused by the low viscosity of water and lead to phenomena of high complexity. Such phenomena are related but not limited to cavitation and turbulent flow due to the interaction between the lubricating water and bearing surface. In this study, a numerical method will be used to simulate the fluid film and bearing geometries in order to perform a thermo-elastohydrodynamic (TEHD) analysis. The dynamic characteristics of the bearing will be calculated and the results will be discussed. The novelty of the study is evident in but not limited to the determination of the elastic deformation of a WLB during operation, as well as the effect of surface roughness, cavitation, and thermal effects on bearing characteristics.

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Section: Introductionmentioning

confidence: 99%

Investigation of Cavitated Flow in Water-Lubricated Bearings Considering Surface Roughness, Thermal, and Elastic Effects

Charamis,

Nikolakopoulos

2024

Lubricants

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“…According to Sahu and Sharma, 23 the minimum fluid film thickness, lubricant flow, and fluid film damping coefficients are all improved by the three‐dimensional irregularities on the bearing surface. Tauviqirrahman et al 24 reported that the heterogeneous rough/smooth bearings may bear more load and produce less noise than conventional bearings. According to Bangotra and Sharma, 25 the influence of waviness on the bearing surface increases load capacity and, lowers the friction coefficient.…”

Section: Introductionmentioning

confidence: 99%

Impact of partial surface waviness on the tribological performance of hydrodynamic journal bearing

Bangotra

Sharma

2022

Lubrication Science

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In this paper, the static performance analysis of journal bearing having full and partial surface waviness has been presented. The surface waviness is to be considered in the full, first half, second half, and pressure-increasing and decreasing regions of the bearing for analysis. The effect of surface waviness is considered by modifying the lubricant flow governing Reynolds equation with the film thickness equation and it is solved with the finite element method to get performance parameters like bearing load capacity, friction coefficient, and so forth operating under eccentricity ratios range of 0.2-0.8. The waviness geometrical parameters like waviness numbers and amplitudes are also considered in circumferential, axial, and both directions in the selected regions. The maximum performance has been found for waviness in the full and pressureincreasing region in the circumferential direction at a high eccentricity ratio.

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“…They reported that a textured bearing operating at low rotational speeds resulted in an increase in the load-carrying capacity and reduction in frictional losses in comparison to an untextured bearing working in similar operating conditions. Tauviqirrahman et al 29 performed a CFD analysis on hydrodynamic journal bearings having heterogeneous rough/smooth surfaces. They have modeled the bearing surface using an alternate radial zone of rough and smooth surfaces.…”

Section: Introductionmentioning

confidence: 99%

Performance of rough surface hydrodynamic circular and multi-lobe journal bearings in turbulent regimes

Narwat

Kumar

Singh

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part J:

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This article deals with the steady and dynamic performance analysis of rough surface circular and multi-lobe journal bearings operating with non-Newtonian lubricant in turbulent regimes. The numerical solution of Reynold's equation was obtained using the finite element method. To account for surface roughness, the Patir and Cheng model was used, and fluid turbulent behavior was modeled using the turbulent theory as proposed by Ng and Pan. The non-Newtonian behavior of the lubricant is presented by the Rabinowitsch fluid model, and JFO boundary conditions are used to solve Reynold's equation, considering gaseous cavitation. The bearing with micro-roughness has been considered in numerical analysis and transverse roughness has been reported to improve bearing performance indices. Among the different bearing design configurations, the two-lobe bearing configuration provides significantly improves the minimum film thickness, hydrodynamic pressure, and dynamic parameters. The presence of turbulent flow and transverse surface roughness produces a synergistic effect that enhances the minimum film thickness, stiffness, and damping parameters of journal bearings. This study provides a detailed comparison between various bearing designs and recommends the use of two-lobe bearings for high-speed applications.

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CFD Analysis of Journal Bearing with a Heterogeneous Rough/Smooth Surface

Cited by 15 publications

References 30 publications

Investigation of Cavitated Flow in Water-Lubricated Bearings Considering Surface Roughness, Thermal, and Elastic Effects

Investigation of Cavitated Flow in Water-Lubricated Bearings Considering Surface Roughness, Thermal, and Elastic Effects

Impact of partial surface waviness on the tribological performance of hydrodynamic journal bearing

Performance of rough surface hydrodynamic circular and multi-lobe journal bearings in turbulent regimes

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