Application of the fluid–structure interaction technique for the analysis of hydrodynamic lubrication problems

Wodtke, Michał; Olszewski, Artur; Wasilczuk, Michał

doi:10.1177/1350650113481147

Cited by 35 publications

(19 citation statements)

References 17 publications

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“…The traditional method for hydrodynamic journal bearing analysis usually applies the lubrication theory based on classical Reynolds equation (Brizmer et al [1], Buscaglia et al [2], D'Agostino and Senatore [3]) which is simplified form of Navier-Stokes equations (Arghir et al [4], Sahlin et al [5], Li et al [6]. and Wodtke et al [7]) and continuity equation with usual thin film assumptions and thus has limitations in its applications. The solution of Reynolds equation is obtained using finite difference or finite element methods which lead to the subsequent development of simulation codes that integrate various numerical and empirical models taking into account physical phenomena such as turbulence, heat transfer, and cavitation.…”

Section: Introductionmentioning

confidence: 99%

“…This result differs from the Reynolds boundary condition solution to determine the onset of cavitation resulting in an increased pressure build-up. Wodtke et al [7] and Lin et al [8] worked on the analysis of bearings with cavitation coupled with FSI and found that the deformations are significant. Also, the cavitation problem becomes more severe with an increase in speed and significant computation time is required as observed by Geller et al [20], Riedel et al [21], Osman [22] and Montazeri [23].…”

Section: Introductionmentioning

confidence: 99%

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A two-way FSI analysis of multiphase flow in hydrodynamic journal bearing with cavitation

Dhande¹,

Pande²

2017

J Braz. Soc. Mech. Sci. Eng.

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Abbreviations e Eccentricity between shaft and bearing, m C Radial clearance, m R Radius of the shaft, m h Film thickness, m ω Angular velocity, rad/sec W Load carrying capacity, N O' Bearing centre O Shaft centre ρ Fluid density, kg/m 3 ρ l Liquid density, kg/m 3 ρ v Vapor density, (kg/m 3) v Fluid velocity P Static pressure, Pa τ Stress tensor F External body force, N t Time ε Eccentricity ratio σ Liquid surface tension coefficient v Fluid velocity vector C e , C c Mass transfer source terms connected to the growth and collapse of the vapor bubbles, respectively F cond Condensation coefficient F evap Evaporation coefficient p v Saturation pressure of the fluid [M s ] Structural mass matrix [M f ] Fluid mass matrix [F s ] Structural force matrix [F f ] Fluid force matrix [R] Coupling matrix Δh Relative rigid displacement of the two bearing surfaces δ Total elastic deformation of the shaft and bearing system Abstract This work deals with a study of a three-dimensional CFD analysis and multi-phase flow phenomena for hydrodynamic journal bearing with integrated cavitation. The simulations are carried out considering the realistic bearing deformations by two-way fluid-structure interactions (FSI) along with cavitation using ANSYS ® Workbench software. The design optimization module is used to generate the optimized solution of the attitude angle and eccentricity for the combination of operating speed and load. Bearings with and without cavitation are investigated. A drop in maximum pressure value is observed when cavitation is considered in the bearing. The rise in oil vapor distribution is noted with an increase in shaft speed which lowers the magnitude of the pressure build up in the bearing. The bearing deformations are analyzed numerically and found increasing with an increase in shaft speed. The experimental data obtained for pressure distribution showed good agreement with numerical data along with a considerable reduction in computation time.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A two-way FSI analysis of multiphase flow in hydrodynamic journal bearing with cavitation

Dhande¹,

Pande²

2017

J Braz. Soc. Mech. Sci. Eng.

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“…The rotation speed was found to play a dominant role in augmenting the lubricant temperature and promoting the cavitation formation, which implies serious constrains on the design of highly-rotating journals. The isothermal operation of journal bearings was investigated numerically by (Wodtke, Olszewski and Wasilczuk, 2013), where the formation of cavitation was predicted in terms of the operating conditions examined. Unlike the case of water-lubricated journal bearings, it was observed that the negative lubricant pressure has no obvious impact on the performance of oil-lubricated bearings.…”

Section: Introductionmentioning

confidence: 99%

A Comprehensive Fluid-Solid Interaction Analysis of Finite Journal Bearings

et al. 2021

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As key elements in plenty of rotating machinery, the elastohydrodynamic performance of journal bearings should be carefully checked in light of the design and operating parameters considered. This first part of the current study aims to numerically analyse the operation of journal bearings under alignment conditions. In the fluid-solid interaction analysis conducted, the lubricant flow field is solved using the finite volume method. Based on finite elements strategy, a structural analysis is then implemented to the solid bearing using the pressure distribution computed earlier on its inner surface. A wide range of operating conditions has been considered including the eccentricity ratio (0.1≤ε≤0.9), bearing length-diameter ratio (0.8≤L/D≤2), and rotation speed (4,000≤N≤10,000 rpm). Three principal categories of operational quantities have inspected, namely; the lubricant pressure distribution, overall performance parameters, and structural aftereffects. Among all the parameters examined, the eccentricity ratio is the most influential one on the performance of journal bearings. As it increases with applying heavier loads, a significant rise occurs in each of the friction force, power loss, stress levels, and deformation on the inner surface of the bearing. The bearing length and rotation speed, on the other hand, affect the bearing performance as well, but to a less extent.

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“…Wodtke et al. 34 considered steady-state operation in two cases using fluid–structure interaction (FSI), in which one analysis was applied to a water-lubricated journal bearing and the other to a hydrodynamic thrust bearing lubricated with oil. Zhang et al.…”

Section: Introductionmentioning

confidence: 99%

Natural Frequency Region – Fluid-Structural-Interaction approach for dynamic impact predictions and experimental verification of rubber–metal bonded systems with fluid

Luo

Lou

Wang

et al. 2018

Proceedings of the Institution of Mechanical Engineers, Part F:

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This paper presents an integrated procedure for dynamic impact predictions and an experimental verification of rubber–metal bonded components with fluid to be used as a potential application in rail vehicle suspensions. There are three steps involved in the procedure. First, a quasi-static analysis was performed to verify the elastic properties of the rubber material using hyperelastic models. Second, a dynamic impact evaluation on selected hydro-mounts without fluid was conducted using the Natural Frequency Region (NFR) approach. Finally, a coupled NFR (with Fluid-Structural-Interaction) approach, different from the usual viscoelastic methods, was initiated to predict the dynamic impact responses of these components with the fluid in time domain. All the analyses have been validated with experimental data. The first two stages have been briefly described and the third stage is detailed in this paper. It should be noted that a powerful computer with multi-central processing units is essential to obtain a reasonable result within an acceptable time frame. It took approximately 40 h wall-clock time to complete the analysis using a workstation with 10 central processing units. It has been suggested that the natural frequency region–fluid–structure interaction methodology is reliable and could be used at the design stage and for engineering applications.

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Application of the fluid–structure interaction technique for the analysis of hydrodynamic lubrication problems

Cited by 35 publications

References 17 publications

A two-way FSI analysis of multiphase flow in hydrodynamic journal bearing with cavitation

A two-way FSI analysis of multiphase flow in hydrodynamic journal bearing with cavitation

A Comprehensive Fluid-Solid Interaction Analysis of Finite Journal Bearings

Natural Frequency Region – Fluid-Structural-Interaction approach for dynamic impact predictions and experimental verification of rubber–metal bonded systems with fluid

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