A methodology for performance prediction: aerodynamic analysis of axially loaded gas foil bearing

Kumar, Jitesh; Khamari, Debanshu S; Behera, Suraj K.; Sahoo, Ranjit Kumar

doi:10.1007/s12046-021-01721-1

Cited by 7 publications

(6 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The article concluded that with an increase in plate thickness and vertex angle of support, load carrying capacity improves while decreasing above-mentioned two factors eccentricity of the rotor found to increase. Recently, Kumar et al 47 implemented Sobol's sensitivity analysis to determine the parameters of GFTB which have most influence on load carrying capacity and power loss. The goal of the investigation was to maximize the load carrying capacity and minimize the power loss.…”

Section: Two-dimensional Modelmentioning

confidence: 99%

A review of thermohydrodynamic aspects of gas foil bearings

Kumar

Khamari

Behera

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part J:

Self Cite

View full text Add to dashboard Cite

In recent times, gas foil bearings have become popular for commercial use in the aircraft and space industry, turbocompressors, turbine generators and in the more complex fields of turbochargers and turboexpanders. The gain in popularity for gas foil bearings is due to their features such as contamination-free zone, wide temperature range, higher stability and higher reliability characteristics as compared to other types of bearings. However, several challenges have come across while analysing the gas foil bearing behaviour at different working conditions. The current paper presents an overview of the work done in the past few decades for developing numerical models and listing the efforts of several researchers around the world to conduct the experimental investigation for predicting and analysing thermohydrodynamic behaviour of gas foil bearings at different operating conditions. It is expected that the current paper will help readers to thoroughly understand the hydrodynamic and thermal aspects of gas foil bearings.

show abstract

Section: Two-dimensional Modelmentioning

confidence: 99%

A review of thermohydrodynamic aspects of gas foil bearings

Kumar

Khamari

Behera

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part J:

Self Cite

View full text Add to dashboard Cite

show abstract

“…There is no thumb rule to choose the number of hidden layers and the number of hidden layer neurons for the network training. But, it is justified that a single hidden layer is sufficient for successful training of the network 22 . The number of neurons in the input and out layers equals the number of input and output layer parameters, respectively.…”

Section: Ann and Anfis Methodologymentioning

confidence: 99%

“…But the use of artificial intelligence (AI) techniques is rare in the field of SGTB. The AI technique, a data‐driven approach, can process a wide variety of data in less computational time and predict the output with incomplete information 22 . Moreover, the ease of understanding and usage makes it more applicable than statistical approaches.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A methodology for performance prediction: Hydrodynamic investigation of spiral grooved thrust bearing

Mishra

Behera

2023

Lubrication Science

View full text Add to dashboard Cite

This paper presents the design and numerical optimization of oil‐lubricated spiral grooved thrust bearing (SGTB) for its application at high speed and axial loading conditions. A numerical model is developed using nonlinear incompressible Reynold's equation and is solved using the finite volume method (FVM) to determine the static characteristics over the bearing surface. Further, the influence of groove parameters such as spiral angle, groove angle, film thickness ratio, number of grooves and speed on the static characteristics of the bearing has been investigated. The result shows that the designed oil‐lubricated SGTB can operate at high‐speed conditions and withstand high axial load. Further, the characteristic data sets acquired from the numerical analysis are trained using an artificial neural network (ANN), and their performance is evaluated through the computation of the regression coefficient. Then adaptive neuro‐fuzzy interface system (ANFIS) surface plot is obtained to determine the optimum bearing parameters.

show abstract

“…In addition, when the speed increases, stiffness coefficients tend to rise while damping coefficients fall. Later, Kumar et al [74] deduced the most effective parameters on the load-carrying capacity of a GFB. It was found that minimum film thickness, angular extent ratio at wedging, the angular extent of the thrust pad, and rotating speed have a substantial influence on load capacity.…”

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.

View full text Add to dashboard Cite

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.

show abstract

A methodology for performance prediction: aerodynamic analysis of axially loaded gas foil bearing

Cited by 7 publications

References 28 publications

A review of thermohydrodynamic aspects of gas foil bearings

A review of thermohydrodynamic aspects of gas foil bearings

A methodology for performance prediction: Hydrodynamic investigation of spiral grooved thrust bearing

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

Contact Info

Product

Resources

About