Effect of Cavitation and Temperature on Fluid Film Bearing Using CFD and FSI Technique: A Review

Kamat, Harishkumar; Kini, Chandrakant R.; Shenoy, Bhaskar

doi:10.1007/s11831-022-09847-z

Cited by 5 publications

(2 citation statements)

References 71 publications

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“…For the cavitation research there are still some open questions, such as the effects of the micro-jet and the shockwave caused by the cavitation on the pitting [1]. In this work we focus on the cavitation in lubrication, and extensive papers on this topic for both numerical and experimental ways can be found, and the reader is referred to the reviews of Dowson et al [2], Braun et al [3], Geike [4], and Kamat et al [5] For analyzing the lubrication problems, the Reynolds equation has been widely used, but the effects of cavitation are not considered in it. In order to analyze the film pressure behaviors with the cavitation effects, attempts have been made by many researchers and different cavitation models have been developed [6].…”

Section: Introductionmentioning

confidence: 99%

A new method to solve the Reynolds equation including mass-conserving cavitation by physics informed neural networks (PINNs) with both soft and hard constraints

Xi,

Deng,

2024

Friction

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In this work, a new method to solve the Reynolds equation including mass-conserving cavitation by using the physics informed neural networks (PINNs) is proposed. The complementarity relationship between the pressure and the void fraction is used. There are several difficulties in problem solving, and the solutions are provided. Firstly, the difficulty for considering the pressure inequality constraint by PINNs is solved by transferring it into one equality constraint without introducing error. While the void fraction inequality constraint is considered by using the hard constraint with the max-min function. Secondly, to avoid the fluctuation of the boundary value problems, the hard constraint method is also utilized to apply the boundary pressure values and the corresponding functions are provided. Lastly, for avoiding the trivial solution the limitation for the mean value of the void fraction is applied. The results are validated against existing data, and both the incompressible and compressible lubricant are considered. Good agreement can be found for both the domain and domain boundaries.

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Section: Introductionmentioning

confidence: 99%

A new method to solve the Reynolds equation including mass-conserving cavitation by physics informed neural networks (PINNs) with both soft and hard constraints

Xi,

Deng,

2024

Friction

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“…Based on these important CFD/FSI related literatures it is found that reduction in fluid film pressure value was observed by considering the elastohydrodynamic effect. Hence, the impact of elastic deformation on the bearing performance cannot be neglected 14 – 18 . Although oil film pressure-induced bearing deformation is relatively small, its importance cannot be understated.…”

Section: Introductionmentioning

confidence: 99%

Topological optimization and fatigue life prediction of a single pad externally adjustable fluid film bearing

Kamat,

Pai,

Vernekar

et al. 2024

Sci Rep

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This work focuses on the prediction and comparison of the fatigue life of topologically optimized pads in an externally adjustable fluid film (EAFF) bearing. It integrates one-way/two-way fluid–structure interaction analysis, topological optimization (TO), and design modifications of the pad of an externally adjustable fluid film bearing. The major goal is to create an optimum pad design that minimizes weight and maintains structural integrity, and then to predict and compare the fatigue life of these alternative designs. The outcomes of the present study are as follows: (i) Two-way FSI results show a decrease of 65.64% in hydrodynamic fluid film pressure when compared to one-way FSI results because they take into account modifications in the fluid region's geometry caused by pad deformation; (ii) even though the maximum pad deformation in optimized pad geometry (Type-4) resulting from oil film pressure is relatively small (0.0036551 mm), the influence of pad deformation on the fluid domain due to hydrodynamic fluid film pressure cannot be understated; and (iii) when comparing the TO technique's results with fatigue life results, four elongated holes in the radial direction (Type-4) are most appropriate.

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Performance Optimization of a Multi-groove Water Lubricated Journal Bearing with Partial Slip by Taguchi Analysis

Ganesha,

Joseph,

Pai

et al. 2023

Arab J Sci Eng

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The importance of preserving the ecological balance has paved the way for developing water lubricated bearings for marine vessels and other various applications. These bearings have found widespread applications in high pressure water pumps, water-power plants and power generation stations in sea, mining industries, ships, boats and submarines. To investigate the performance envelope of a water lubricated journal bearing (WLJB) with partial slip/no slip pattern, a multi-groove bearing model is developed and analyzed using CFD in the present study. Taguchi analysis method is utilized to determine the highest influential parameter affecting the pressure distribution and load-carrying capacity of a water lubricated journal bearing. From Taguchi method, optimum values identified for design parameters such as attitude angle, groove angle, groove height and number of grooves are 60°, 9°, 7 mm and 2, respectively. For the optimum combination model, a higher load bearing capacity of 1484.5 N is attained. Approximately, 2.88 times increase in peak pressures are noted from the current optimal bearing model by comparing with previous findings. Results indicated that the number of grooves and groove angle are the most influential parameters affecting the bearing load capacity. Partial slip conditions are applied at the grooved surfaces of a bearing model designed based on the identified optimal groove parameters. Influence of varying slip intensity on bearing load capacity is analyzed using CFD simulation. Appropriate selection of slip regions and slip amplitude is found to play a major role influencing the performance of the water lubricated journal bearing.

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Effect of Cavitation and Temperature on Fluid Film Bearing Using CFD and FSI Technique: A Review

Cited by 5 publications

References 71 publications

A new method to solve the Reynolds equation including mass-conserving cavitation by physics informed neural networks (PINNs) with both soft and hard constraints

A new method to solve the Reynolds equation including mass-conserving cavitation by physics informed neural networks (PINNs) with both soft and hard constraints

Topological optimization and fatigue life prediction of a single pad externally adjustable fluid film bearing

Performance Optimization of a Multi-groove Water Lubricated Journal Bearing with Partial Slip by Taguchi Analysis

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