An electrorheological hydrostatic journal bearing for controlling rotor vibration

Bouzidane, Ahmed; Thomas, Marc

doi:10.1016/j.compstruc.2007.02.006

Cited by 63 publications

(36 citation statements)

References 16 publications

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“…However, in subsequent years the controllable SFDs working in active [10,11] or semiactive concepts [12][13][14][15][16][17][18][19] have been developed. The concept of semi-active working mode accomplished by the electromagnetic principle is represented with SFDs lubricated by electrorheological [12,13] or magnetorheological [16][17][18][19] fluids.…”

Section: Introductionmentioning

confidence: 99%

A computational fluid dynamics investigation of the segmented integral squeeze film damper

et al. 2019

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Rotor vibration attenuation is achieved with damping devices which work on different, often mutually coupled, physical principles. Squeeze film dampers are damping devices that have been widely used in rotordynamic applications. A new concept of a 5-segmented integral squeeze film damper, in which a flexure pivot tilting pad journal bearing is integrated, was investigated. The damper is studied for the eccentric position between the outer and inner ring of the squeeze film land. The ANSYS CFX software was used for solving the pressure and velocity distribution. The development of the complex three-dimensional computational fluid dynamics model of the squeeze film damper, learning more about the effect of the forces in the damper, and the knowledge about the behaviour of the flow are the principal contributions of this article.

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Section: Introductionmentioning

confidence: 99%

A computational fluid dynamics investigation of the segmented integral squeeze film damper

et al. 2019

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“…The traditional SFDs [4] need to be designed for one free vibration mode shape, which should be eliminated in a rotor layout. Therefore, controllable SFDs working in active [5,6] or semi active concepts [7][8][9][10][11] have been developed. The concept of semi active working mode is represented by SFDs lubricated by electrorheological [7,8] or magnetorheological [9][10][11] fluids.…”

Section: Introductionmentioning

confidence: 99%

Numerical computation of the damping and stiffness coefficients of the classical and magnetorheological squeeze film damper

et al. 2018

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Technological solution, frequently used to suppress vibrations in rotating machines, consists in adding damping devices between the rotor and its frame. This is enabled by dampers working on the principle of a squeezing thin classical or magnetorheological fluid film. The Navier-Stokes equations, Reynolds equation, and modified Navier-Stokes equations are used to determine the pressure distribution in the thin fluid film. The damping and stiffness coefficients are computed by the developed procedure presented in this paper. The proposed computational approach is based on the perturbation of the synchronous circular whirling motion. The carried-out computational simulations show that the investigated mathematical models of the squeeze film damper and magnetorheological squeeze film damper allowed computation of the damping and stiffness coefficients. It has been found that the stiffness coefficients computed by the proposed mathematical models may be different.

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“…They proved that electrorheological fluids at high shear rate under constant temperature follows the Bingham model in realistic bearings. The vibration control of high speed rotor systems by considering electrorheological fluids are explained by the literature [17][18][19]. The present work focus on the use of electrorheological fluid (FRF) as a lubricant in the high speed turbocharger floating ring bearings.…”

Section: Introductionmentioning

confidence: 99%

Semi-active vibration control of high-speed rotor system with electrorheological bearing fluid

Mutra

Srinivas

2018

MATEC Web Conf.

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Present work focuses on the use of electrorheological fluid (ERF) as a lubricant in the high speed turbocharger rotor supported on floating ring bearings. The rotor is analysed by finite element modelling with gyroscopic effects and bearing forces. The ERF contains one carrier fluid and active particles that react to external electric field, which induces a yield stress in the fluid increasing its viscosity. In order to control the rotor vibration amplitudes, the dynamic changes in the fluid viscosities at the inner and outer films of bearing are employed with external electric field. A case study of automotive turbocharger rotor is considered and the effect of semi-active control is illustrated on the dynamic response of the system.

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An electrorheological hydrostatic journal bearing for controlling rotor vibration

Cited by 63 publications

References 16 publications

A computational fluid dynamics investigation of the segmented integral squeeze film damper

A computational fluid dynamics investigation of the segmented integral squeeze film damper

Numerical computation of the damping and stiffness coefficients of the classical and magnetorheological squeeze film damper

Semi-active vibration control of high-speed rotor system with electrorheological bearing fluid

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