Nonlinear Transient Stability Analysis of Meso-Scale Rotor Supported on Gas Foil Journal Bearings

Bhore, Skylab P.; Darpe, Ashish K.

doi:10.1007/s42417-019-00128-x

Cited by 9 publications

(2 citation statements)

References 11 publications

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“…Unstructured grids are solved using the CV method. Bhore et al [68,69] used the CV method for a GFB model using a two-dimensional grid for discretization. Gauss-Siedel iterative scheme is used to solve the discretized equations.…”

Section: Coupled Fluid-structure Modelmentioning

confidence: 99%

A Review on Modeling and Stability Aspects of Gas Foil Bearing Supported Rotors

Khamari¹,

Kumar²,

Behera³

2023

Tribol. Ind.

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Gas foil bearing rotor (GFBR) systems have received significant interest in the field of rotordynamics and vibration analysis. GFBR systems have a wide range of high-speed turbomachinery applications. Due to the high speed, these machines are susceptible to rigorous vibration and instability. Gas foil bearings instigate large amplitude of vibrations at startup and shut down and severe subsynchronous motions during high-speed operations. Over the years, numerous work has been done in the field of high-speed rotors supported on gas foil bearings. Significant improvement has been observed in the stability and feasibility of the GFBR systems. However, accurate model predictions of gas foil bearing still remain a challenge for its widespread usage in high-speed turbomachinery. A comprehensive review needs to be done to study the previous work and pave the way for future research. The current review is majorly divided into three sections. Firstly, various models used for the performance prediction of gas foil bearings are compiled. After that, major causes of instability that manifest during the experiments and practice with gas foil bearing supported rotors is illustrated. Lastly, the developmental attempts made to inhibit the instability is summarised. This paper presents an overall picture of the current engineering scenario and future prospects of the GFBR systems.

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Section: Coupled Fluid-structure Modelmentioning

confidence: 99%

A Review on Modeling and Stability Aspects of Gas Foil Bearing Supported Rotors

Khamari¹,

Kumar²,

Behera³

2023

Tribol. Ind.

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“…However, the low viscosity of air generates weak hydrodynamic pressure in the bearing which affects its LCC [3,4]. Although upon increasing speed the LCC of the bearing can be increased, shear loss and instability issues dominate [5]. Furthermore, instability of the bearing affects frictional properties which significantly degrade the system performance.…”

Section: Introductionmentioning

confidence: 99%

Optimal design of surface texture in meso scale air journal bearing

Hingawe¹,

Bhore²

2021

Surf. Topogr.: Metrol. Prop.

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Meso scale air journal bearing has widespread application in miniaturized systems and there is a strong need to improve its tribological performance. Although surface texturing can improve its performance, very few studies have addressed this issue. Therefore, this paper investigates the influence of texture geometrical parameters on the tribological performance of meso scale air journal bearing. A numerical study is carried out in a thin-film model of the COMSOL 5.2 package. The effect of texture geometrical parameters viz. position, depth, orientation, and slender ratio on tribological characteristics such as load-carrying capacity and friction coefficient is first analyzed by response surface methodology based Box-Behnken design. Further, a multi-objective optimization study is carried out using grey relational analysis. For the optimum design, textured air bearing has obtained ACCEPTED FOR PUBLICATION

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A nonlinear model for dynamic performance analysis of gas foil bearing-rotor system considering frictional contacts

Zhao,

Li,

et al. 2024

Nonlinear Dyn

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Nonlinear Transient Stability Analysis of Meso-Scale Rotor Supported on Gas Foil Journal Bearings

Cited by 9 publications

References 11 publications

A Review on Modeling and Stability Aspects of Gas Foil Bearing Supported Rotors

A Review on Modeling and Stability Aspects of Gas Foil Bearing Supported Rotors

Optimal design of surface texture in meso scale air journal bearing

A nonlinear model for dynamic performance analysis of gas foil bearing-rotor system considering frictional contacts

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