A Thermohydrodynamic Analysis of Large Tilting-Pad Journal Bearing in Laminar and Turbulent Flow Regimes With Mixing

Taniguchi, S.; Makino, T.; Takeshita, Kazuhiro; Ichimura, T.

doi:10.1115/1.2920291

Cited by 76 publications

(80 citation statements)

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“…The main characteristics of the oil flow can also be obtained from the simulation results of the loaded pad. Figure 3 shows the measured oil film thickness of number 2 pad at 3000 r/min and under 180 kN loading [25]. The three-dimensional geometry of the structured mesh for oil is fixed based on the measured film thickness and the mesh independence of the structured mesh has been validated [29].…”

Section: Geometry and Meshingmentioning

confidence: 99%

“…The simulation object is the test tilting-pad journal bearing of Taniguchi et al [25]. Figure 1 depicts the cross section of the entire experimental apparatus.…”

Section: Geometry and Meshingmentioning

confidence: 99%

“…While Bouard et al have compared three turbulence models using Reynolds equation in tilting-pad journal bearings [28], the turbulence models in CFD techniques are different from Reynolds equation and current CFD studies of superlaminar bearings have not provided a detailed comparison of different turbulence models. Thereby, this paper compares temperature and pressure simulation results of fourteen turbulence models with experimental data from Taniguchi et al [25] to determine the most suitable turbulence model for superlaminar simulation and explain the underlying mechanisms and what is superlaminar flow.…”

Section: Introductionmentioning

confidence: 99%

“…Section 2 presents the geometry and meshing of the test superlaminar journal bearing of Taniguchi et al [25]. Section 3 describes fourteen turbulence models to simulate superlaminar flow.…”

Section: Introductionmentioning

confidence: 99%

“…Taniguchi et al [25] established an experimental apparatus for a tilting-pad journal bearing to obtain the bearing surface pressure and temperature data under variable bearing loads and rotating speeds. In this study, the simulation results of a THD model with the modified Reynolds equations can catch the general characteristics of experimental data, but not accurately.…”

Section: Introductionmentioning

confidence: 99%

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Numerical Investigation of Turbulence Models for a Superlaminar Journal Bearing

Ding

Ren

et al. 2018

Advances in Tribology

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With rotating machineries working at high speeds, oil flow in bearings becomes superlaminar. Under superlaminar conditions, flow exhibits between laminar and fully developed turbulence. In this study, superlaminar oil flow in an oil-lubricated tilting-pad journal bearing is analyzed through computational fluid dynamics (CFD). A three-dimensional bearing model is established. CFD results from the laminar model and 14 turbulence models are compared with experimental findings. The laminar simulation results of padside pressure are inconsistent with the experimental data. Thus, the turbulence effects on superlaminar flow should be considered. The simulated temperature and pressure distributions from the classical fully developed turbulence models cannot correctly fit the experimental data. As such, turbulence models should be corrected for superlaminar flow. However, several corrections, such as transition correction, are unsuitable. Among all the flow models, the SST model with low-Re correction exhibits the best pressure distribution and turbulence viscosity ratio. Velocity profile analysis confirms that a buffer layer plays an important role in the superlaminar boundary layer. Classical fully developed turbulence models cannot accurately predict the buffer layer, but this problem can be resolved by initiating an appropriate low-Re correction. Therefore, the SST model with low-Re correction yields suitable results for superlaminar flows in bearings.

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Section: Geometry and Meshingmentioning

confidence: 99%

“…The simulation object is the test tilting-pad journal bearing of Taniguchi et al [25]. Figure 1 depicts the cross section of the entire experimental apparatus.…”

Section: Geometry and Meshingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Section 2 presents the geometry and meshing of the test superlaminar journal bearing of Taniguchi et al [25]. Section 3 describes fourteen turbulence models to simulate superlaminar flow.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Numerical Investigation of Turbulence Models for a Superlaminar Journal Bearing

Ding

Ren

et al. 2018

Advances in Tribology

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Nonlinear dynamic analysis of low viscosity fluid-lubricated tilting-pad journal bearing for different design parameters

Jin

Chen

et al. 2019

Friction

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To reveal nonlinear dynamic rules of low viscosity fluid-lubricated tilting-pad journal bearings (TPJBs), the effects of design parameters on journal center orbits and dynamic minimum film thicknesses of waterlubricated TPJBs with and without static loads are investigated. The hydrodynamic bearing force used in the nonlinear dynamic analysis is an approximate analytical solution including the turbulence effect. The results reveal the methods for vibration suppression and load capacity improvement and give an optimal pivot offset and clearance ratio that can maximize the minimum film thickness. The results also show that four-pad TPJBs with loads between pads are preferred due to good dynamic performance and load capacity. This study would provide some guidance for nonlinear design of low viscosity fluid-lubricated TPJBs under dynamic loads.

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