Experimental Study of Tilting-Pad Journal Bearings—Comparison With Theoretical Thermoelastohydrodynamic Results

Fillon, Michel; Bligoud, Jean-Claude; Frêne, Jean

doi:10.1115/1.2920920

Cited by 105 publications

(37 citation statements)

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“…The theory agreed with the Brockwell et al data within 10 percent. Theoretical results were also compared to experimental results reported by Fillon et al [61]. The effects of the TEHD model on the coefficients was shown in separate plots with synchronously reduced coefficients.…”

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confidence: 88%

A Review of Tilting Pad Bearing Theory

Dimond

Younan

Allaire

2011

International Journal of Rotating Machinery

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A theoretical basis for static and dynamic operation of tilting pad journal bearings (TPJBs) has evolved over the last 50 years. Originally demonstrated by Lund using the pad assembly method and a classic Reynolds equation solution, the current state of the art includes full thermoelastohydrodynamic solutions of the generalized Reynolds equation that include fluid convective inertia effects, pad motions; and thermal and mechanical deformations of the pads and shaft. The development of TPJB theory is reviewed, emphasizing dynamic modeling. The paper begins with the early analyses of fixed geometry bearings and continues to modern analyses that include pad motion and stiffness and damping effects. The development of thermohydrodynamic, thermoelastohydrodynamic, and bulk-flow analyses is reviewed. The theories of TPJB dynamics, including synchronous and nonsynchronous models, are reviewed. A discussion of temporal inertia effects in tilting pad bearing is considered. Future trends are discussed, and a path for experimental verification is proposed.

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confidence: 88%

A Review of Tilting Pad Bearing Theory

Dimond

Younan

Allaire

2011

International Journal of Rotating Machinery

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“…In order to validate the theoretical results of our study, a comparison between experimental data and such theoretical findings will be conducted. The test bearing and other experimental data have been presented in earlier journal publications (Monmousseau et al, 1996 andFillon et al, 1992).The data of the bearing at 20°C are shown in table I. Here in these operating conditions we should mention that the shaft rotational speed is 418 9 rad/s (4000 rpm) and the static load is equal to 2000 N. In our efforts, we have found that the maximum discrepancy between experimental and theoretical results is about 5°C.…”

Section: Static Load Without Unbalance Massmentioning

confidence: 76%

Transient Thermoelastohydrodynamic Study of Tilting-Pad Journal Bearings Under Dynamic Loading

Monmousseau

Fillon

Frêne

1997

Volume 4: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation;

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Nowadays, the tilting-pad journal bearings are submitted to more and more severe operating conditions. The aim of this work is to study the thermal and mechanical behavior of the bearing during the transient period from an initial steady-state to a final steady-state (periodic). In order to study the behavior of this kind of bearing under dynamic loading (Fdyn) due to a blade loss, a nonlinear analysis, including local thermal effects, realistic boundary conditions and bearing solid deformations (TEHD analysis) is realized. After a comparison between theoretical results obtained with four models (ISO, ADI, THD and TEHD) and experimental data under steady-state operating conditions (static load Ws), the evolution of the main characteristics for three different cases of the dynamic load (Fdyn/Ws<1, Fdyn/Ws=1 and Fdyn/Ws>1) is discussed. The influence of the transient period on the minimum film thickness, the maximum pressure, the maximum temperature and the shaft orbit is presented. The final steady-state is obtained a long time after the appearance of a dynamic load.

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“…Several thermohydrodynamic (THD) or thermoelastohydrodynamic (TEHD) analyses have been previously developed (Rohde et al1975;Khonsari et al, 1991;Fillon et al, 1990Fillon et al, , 1992Paranjpe et al 1994). Most of them are steady-state analyses.…”

Section: Introductionmentioning

confidence: 99%

A fast thermoelastohydrodynamic model for dynamically loaded journal bearings behaviour analysis

Fatu¹,

Hajjam²,

Bonneau³

2005

Revue Européenne des Éléments Finis

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An efficient method for thermoelastohydrodynamic (TEHD) journal bearings lubrication analysis is presented. Lubrication film temperature is treated as a time-dependent two-dimensional variable and is averaged over the film thickness. In order to compute the film and solids temperature, a new heat flux conservation algorithm, based on both Finite Element (FEM) -Finite Volume (FVM) methods, is proposed. A key point in this analysis is the consideration of different heat transfer coefficients at film -solids and solidssurroundings boundaries. The Reynolds equation in the film is solved using the FEM discretization. A mass-conserving cavitation algorithm is applied and the effect of viscosity variation with the temperature is taken into account.Downloaded by [University of Western Ontario] at 01:46 15 June 2016

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Experimental Study of Tilting-Pad Journal Bearings—Comparison With Theoretical Thermoelastohydrodynamic Results

Cited by 105 publications

References 0 publications

A Review of Tilting Pad Bearing Theory

A Review of Tilting Pad Bearing Theory

Transient Thermoelastohydrodynamic Study of Tilting-Pad Journal Bearings Under Dynamic Loading

A fast thermoelastohydrodynamic model for dynamically loaded journal bearings behaviour analysis

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