A new gaseous cavitation model in a tilting-pad journal bearing

Ding, Aoshuang; Ren, Xiaodong; Li, Xuesong; Gu, Chen

doi:10.1177/00368504211029431

Cited by 3 publications

(4 citation statements)

References 31 publications

(72 reference statements)

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“…The influence of cavitation has attracted much attention in the hydrodynamic bearings due to the deepening research on the surface-textured bearings. [1][2][3][4][5][6][7][8][9][10] In order to accurately simulate the cavitation phenomenon, the massconserving algorithm is often required. The Elrod algorithm 11 was the first efficient way to implement the wellknown Jakobsson and Floberg 12 and Olsson 13 (JFO) theory.…”

Section: Introductionmentioning

confidence: 99%

“…The other advantages of the algorithm have: (1) The discrete scheme is straightforward. The number of arithmetic operations for one iteration is less than that of the Elrod algorithm; (2) The algorithm is explicit and very convenient to program, without the work of system matrix assembly. The memory requirements are also significantly reduced due to the matrix-free implementation; (3) The algorithm can be naturally transformed to a linear complementarity problem (LCP).…”

Section: Introductionmentioning

confidence: 99%

“…The above review suggests that: (1) The standard multigrid method is inapplicable for accelerating cavitation simulations; (2) The modified schemes for the cavitation multigrid algorithm have not been reached agreement;…”

Section: Introductionmentioning

confidence: 99%

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An explicit cavitation multigrid algorithm for accelerating simulation of surface-textured bearings

Zhao

Zhang

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part J:

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The cavitation has a potential effect on the performance of surface-textured bearings. The traditional mass-conserving cavitation algorithms based on the Gauss-Seidel iteration method become slow as the grid increases. The computation time is unacceptable once the grid consists of a large array of textures. This study developed an explicit cavitation multigrid algorithm to accelerate the simulation of surface-textured bearings. The algorithm was based on the Ausas cavitation algorithm with the advantage of a matrix-free implementation. Novel numerical technologies were developed to overcome the difficulty of the floating free boundaries caused by the cavitation characteristics. An example of surface-dimpled thrust bearings was studied to analyze the algorithm efficiency. The algorithm is shown to be approximate optimal under reasonable solution parameters. It is an alternative to other cavitation algorithms.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

An explicit cavitation multigrid algorithm for accelerating simulation of surface-textured bearings

Zhao

Zhang

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part J:

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“…Regarding the gaseous cavitation in oil, Li et al [7] and Song and Gu [8] consider the lubricant as a mixture of pure liquid and air, as the result of the dissolution and the release of air in an instantaneous equilibrium saturation state. The model satisfies the classical Jakobson-Floberg-Olsson (JFO) conditions, but it does not account for the gaseous cavitation rate, as performed by Hao and Gu [9] and more recently by Ding et al [10].…”

Section: Introductionmentioning

confidence: 99%

Full and Hybrid Multiscale Lubrication Modeling

Francisco

Brunetière

2022

Lubricants

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The numerical solution for the lubrication of parallel rough surfaces cannot be obtained using the well-known flow factors of Patir and Cheng. Nor can it be determined using homogenization techniques. Is there an alternative, besides a purely long-term deterministic way of solving the problem? The present paper aims at proposing a multiscale approach in order to reduce the computing time, specific to deterministic resolutions, while maintaining good accuracy. The configuration is a parallel rough surface slider, with imposed hydrodynamic operating conditions. The domain consists of independent macro-elements, on which the Reynolds equation is solved. Then, the macro-element boundaries are adjusted to ensure global mass conservation. In its hybrid version, the algorithm replaces some well-chosen macro-elements by simple linear finite elements. The results clearly show the potential of our method. Because the lubrication of each macro-element can be processed independently, the multicore architecture of the processor is exploited. Even if the performance depends on the ratio roughness/height, the computing time is half than for the classical deterministic method, with a few percent errors. The work concludes with some recommendations on the configurations for which the multiscale method is best suited, such as surfaces with short correlation lengths.

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Influence of Cavitation and Shaft Deformation in the Analysis of Lubrication of the Stern Bearing

Zhou

Liu

et al. 2023

Applied Sciences

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The cavitation phenomenon and shaft deformation have a significant impact on the tribological performance of the journal bearing. A mixed lubrication model is developed that takes into account surface roughness and asperity contact, as well as the effects of cavitation and deflection. The fluid–solid coupling effect in bearing deformation, asperity contact, and film pressure are investigated. The effect of boundary conditions on the lubrication regimes is discussed. The results of simulations with and without cavitation are compared under steady-state conditions. The results show that when cavitation is considered by the mixed lubrication model under a given load, the eccentricity is reduced, and the maximum oil film pressure is also reduced. The speed range of the bearing simulated with the mixed lubrication model increases after considering deflection deformation. The mixed lubrication model proposed in this paper is able to provide accurate results of pressure distribution and coefficient of friction and can be applied in the design and analysis of journal bearings.

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A new gaseous cavitation model in a tilting-pad journal bearing

Cited by 3 publications

References 31 publications

An explicit cavitation multigrid algorithm for accelerating simulation of surface-textured bearings

An explicit cavitation multigrid algorithm for accelerating simulation of surface-textured bearings

Full and Hybrid Multiscale Lubrication Modeling

Influence of Cavitation and Shaft Deformation in the Analysis of Lubrication of the Stern Bearing

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