Numerical investigation of the air–oil two-phase flow inside an oil-jet lubricated ball bearing

Hu, Jibin; Wu, Wei; Wu, M.Z.; Yuan, Shuai

doi:10.1016/j.ijheatmasstransfer.2013.09.013

Cited by 85 publications

(44 citation statements)

References 20 publications

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“…For high-speed transmission systems, such as aircraft engines, turbomachinery, and drive trains, oil-jet is applied to the ball bearing cooling [4]. The automotive transmission is now focused toward higher efficiency and greater power density [5]. A higher rated speed is beneficial to the greater power density.…”

Section: Introductionmentioning

confidence: 99%

Jet cooling for rolling bearings: Flow visualization and temperature distribution

et al. 2016

Applied Thermal Engineering

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Section: Introductionmentioning

confidence: 99%

Jet cooling for rolling bearings: Flow visualization and temperature distribution

et al. 2016

Applied Thermal Engineering

Self Cite

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“…Hu et al [17] studied the oil distribution and the power losses of a bearing by means of commercial software using a rigid mesh motion/mesh sliding strategy. This approach relies on multiple meshing regions with interfaces between the grids.…”

Section: Introductionmentioning

confidence: 99%

Innovative Meshing Strategies for Bearing Lubrication Simulations

2020

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Efficiency improvement is the new challenge in all fields of design. In this scenario the reduction of power losses is becoming more and more a main concern also in the design of power transmissions. Appropriate models to predict power losses are therefore required from the earliest stages of the design phase. The aim of this project is to carry out lubrication simulations of several variants of a cylindrical roller bearing to understand the lubricant distribution and the related churning power losses. Several strategies to reduce the computational effort were used. Among them the sectorial symmetry and three innovative meshing strategies (purely analytical with and without interfaces and analytical/subtractive) that were implemented in the OpenFOAM ® environment. The results of the different approaches were compared among them and reasonable savings in terms of computational effort were shown.

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“…To overcome this problem, the cavitation lubricant is treated as two-phase mixed fluid. The two-phase mixed fluid models have been developed, those models can be divided into three types based on calculation approaches of gas phase volume fraction：(1) the model based on the R-P equation [4,5] (2) the model based on gas solubility and surface tension of bubble [4,[6][7][8][9] (3) the model based on transport equation of the gas phase volume fraction [10][11][12][13][14][15]. In addition, with the rapid development of computational fluid dynamics (CFD) technology, some researchers have proposed performance analysis of bearings with the cavitation using the CFD software [7,11,[16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Characteristics of High-speed Water-lubricated Spiral Groove Thrust Bearing based on Turbulent Cavitating Flow Lubrication Model

Lin¹,

Wang²,

Jiang³

et al. 2020

Preprint

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In this paper, a turbulent cavitating flow lubrication model based on two-phase fluid and population balance equation of bubbles was established to analyze dynamic characteristics of high speed water-lubricated spiral groove thrust bearings(SGTB). Stiffness and the damping coefficients of the SGTB were calculated using the perturbation pressure equations. An experimental apparatus was developed to verify the theoretical model. Simulating and experimental results show that the small-sized bubbles tend to generate in the turbulent cavitating flow when at a high rotary speed, and the bubbles mainly locate at the edges of the spiral groove. The simulating results also show that the direct stiffness coefficients are increased due to cavitation effect, and cross stiffness coefficients and damping coefficients are hardly affected by the cavitation effect. Turbulent effect on the dynamic characteristics of SGTB is much stronger than the cavitating effect.

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Numerical investigation of the air–oil two-phase flow inside an oil-jet lubricated ball bearing

Cited by 85 publications

References 20 publications

Jet cooling for rolling bearings: Flow visualization and temperature distribution

Jet cooling for rolling bearings: Flow visualization and temperature distribution

Innovative Meshing Strategies for Bearing Lubrication Simulations

Dynamic Characteristics of High-speed Water-lubricated Spiral Groove Thrust Bearing based on Turbulent Cavitating Flow Lubrication Model

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