Correlations for heat generation and outer ring temperature of high speed and highly loaded ball bearings in an aero-engine

Flouros, Michael

doi:10.1016/j.ast.2006.08.002

Cited by 34 publications

(21 citation statements)

References 4 publications

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“…The heat generated is quantified using a Rolls-Royce empirical correlation similar to the one presented in Flouros [7].…”

Section: Accepted Manuscript N O T C O P Y E D I T E Dmentioning

confidence: 99%

“…The heat generated by a bearing is the sum of the different effect, including sliding, spinning and viscous effects [8] and the correlation presented by Flouros [7] captures all these effects in one empirical correlation in this form:…”

Section: Accepted Manuscript N O T C O P Y E D I T E Dmentioning

confidence: 99%

“…are assumed, given that only a detailed analysis/test (2 phase CFD/rig) out of scope for this study, can correctly evaluate them. Flourus [7] showed that uneven flow strongly affects the heat generation and temperature distribution. Further studies should focus on this.…”

Section: Accepted Manuscript N O T C O P Y E D I T E Dmentioning

confidence: 99%

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Transient Thermal Modeling of Ball Bearing Using Finite Element Method

Sibilli

Igie

2017

Journal of Engineering for Gas Turbines and Power

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Gas turbines are fitted with rolling element bearings, which transfer loads and supports the shafts. The interaction between the rotating and stationary parts in the bearing causes a conversion of some of the power into heat, influencing the thermal behavior of the entire bearing chamber. To improve thermal modeling of bearing chambers, this work focused on modeling of the heat generated and dissipated around the bearings, in terms of magnitude and location, and the interaction with the components/systems in the bearing chamber. A thermal network (TN) model and a finite element (FE) model of an experimental high-pressure shaft ball bearing and housing were generated and a comparison to test rig results have been conducted. Nevertheless, the purpose of the thermal matching process that focused on the FE model and experimental data is to provide a template for predicting temperatures and heat transfers for other bearing models. The result of the analysis shows that the predictions of the TN are considerate, despite the simplifications. However, lower relative errors were obtained in the FE model compared to the TN model. For both methods, the highest relative error is seen to occur during transient (acceleration and deceleration). This observation highlights the importance of boundary conditions and definitions: surrounding temperatures, heat split and the oil flow, influencing both the heat transfer and heat generation. These aspects, incorporated in the modeling and benchmarked with experimental data, can help facilitate other related cases where there is limited or no experimental data for validation.

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“…The heat generated is quantified using a Rolls-Royce empirical correlation similar to the one presented in Flouros [7].…”

Section: Accepted Manuscript N O T C O P Y E D I T E Dmentioning

confidence: 99%

Section: Accepted Manuscript N O T C O P Y E D I T E Dmentioning

confidence: 99%

See 1 more Smart Citation

Transient Thermal Modeling of Ball Bearing Using Finite Element Method

Sibilli

Igie

2017

Journal of Engineering for Gas Turbines and Power

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“…The thermal network method will be employed to analyze and precisely determine the boundary conditions [11], [12]. The simulation of the temperature field of the active parts under the space grease lubricating condition will be carried out, and the results will be discussed in detail.…”

Section: Introductionmentioning

confidence: 99%

Modeling and simulation of the thermal network in a space gear-bearing system

Zhang

Liu

2010

The 2010 IEEE International Conference on Information and Automation

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A thermal network model of the gear-bearing system used in a certain type of space robot was built, for investigating the temperature field distribution of the system in the space environment. Based on the Fourier's law of heat conduction, the thermal impedances of the components were computed by taking the vacuum and the grease lubricant conditions into account. The temperature of the key points of the system was obtained. The finite element simulation was performed to verify the validity of the model by using a finite element sub-modeling technique. The results show that the thermal resistances computed by the heat network model meet well with those by the finite element method. It shows that the thermal network model and the finite element simulation for the gear-bearing system are feasible. The present work provides a crucial support for the research methodology of the executive components of the space robot.

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“…The uncertainty of the rolling bearing friction torque has an important influence on working performance of the system [1][2][3][4][5][6][7]. For a long time, the problem of the dynamic evaluation for the rolling bearing friction torque has been given the attention continuously.…”

Section: Introductionmentioning

confidence: 99%

Uncertainty and its Evolvement of Rolling Element Bearing Friction Torque

Xia

Zhang

2009

2009 Second International Symposium on Information Science and Engineering

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Based on the information poor system theory, the concepts, viz., the measure, the standard deviation, and variation coefficient of the mean of the fluctuant ranges, were proposed to study the relationship between the uncertainty of the friction torque and the rotational speed of the rolling element bearing. The uncertainty was investigated using the measure to describe its size, using the standard deviation to depict its fluctuant state, and using the variation coefficient to character its evolutive history. The experiments on two types of the rolling element bearings, HKTA and HKTB, indicate that for the uncertainty of the friction torque, as the rotational speed is raised the value of its measure increases and both its fluctuant state and evolutive history present the trends of the nonlinearly fluctuant change.

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Correlations for heat generation and outer ring temperature of high speed and highly loaded ball bearings in an aero-engine

Cited by 34 publications

References 4 publications

Transient Thermal Modeling of Ball Bearing Using Finite Element Method

Transient Thermal Modeling of Ball Bearing Using Finite Element Method

Modeling and simulation of the thermal network in a space gear-bearing system

Uncertainty and its Evolvement of Rolling Element Bearing Friction Torque

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