On the Numerical Analysis to the Thermoelastohydrodynamic Lubrication of a Tilting Pad Inclusive of Side Leakage

Yang, Peiran; Rodkiewicz, C. M.

doi:10.1080/10402009708983653

Cited by 27 publications

(14 citation statements)

References 10 publications

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“…In terms of the oil film shape parameter 'a' the non-dimensional load parameter, centre of pressure and fluid film temperature with reference to Chaturvedi [17] are described as follows. 2…”

Section: Non Dimensional Load Centre Of Pressure and Maximum Temperamentioning

confidence: 99%

“…Modified numerical solutions are required to determine the pressure, temperature and elastic deformation of the oil film and pad respectively using three dimensional flow. Yang and Rodkiewicz [2] used a finite difference method to determine the thermo elasto-hydrodynamic lubrication of a tilting pad. A finite difference method was used to determine the pressure, temperature and elastic deformation of the oil film and pad respectively.…”

Section: Introductionmentioning

confidence: 99%

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Theoretical Evaluation of the Operational Characteristics in a Large Thrust Bearing

2015

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In this paper the non-dimensional load, volumetric flow rate, energy flux, oil film temperature and power loss parameters of a tilting-pad thrust bearing are formulated. The objective of the paper is to determine the novel non dimensional thermal, volumetric and power loss parameters in addition to the load and energy flux parameters of the bearing. The computation is done by formulating and numerically solving for the oil film thickness, two dimensional Reynolds', Vogel-Cameron viscosity-temperature relationship and energy equations at the different nodes of the oil film using a finite difference procedure. The planar film shape polynomial ensures the accuracy of the slider bearing shape and pressure distribution. The numerical procedure evaluates the value of 'a' at which the load is maximum. The variation of the bearing centre of pressure with respect to the corresponding values of 'a' is studied. From the fluid film temperature equation the rise in bearing temperature corresponding to the range of 'a' values is determined. The oil film temperature distribution results are found satisfactory in terms of computer time and convergence criteria. The accuracy of the results is validated in the variation of the load and thermal contours. A mesh independence test is conducted using three meshes of different sizes. The mesh independent solution and convergence is obtained for the smallest mesh that also reduces simulation run time. This data and analysis serves as an input to determine the dynamic stiffness and damping coefficients. It includes the scope to develop a design method for safe operation of the bearing at any speeds in vertical hydro-electric rotors.

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Section: Non Dimensional Load Centre Of Pressure and Maximum Temperamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Theoretical Evaluation of the Operational Characteristics in a Large Thrust Bearing

2015

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“…Then, equation (19) is solved to obtain the temperature distribution in the oil layer h oil . After that, a sequential column sweeping technique [29] is employed to obtain the temperature fields within the films and the moving body by solving equations (12) and (16) and the heat flux continuity equation [24] at the liquid-solid interface from the meniscus X * in to the outlet boundary X out . The second step is to solve equation (18) by MLMI method [28] to calculate the temperature on the stationary surface based on the temperature obtained in the first step.…”

Section: Numerical Schemesmentioning

confidence: 99%

A study on starved micro-thermal elastohydrodynamic lubrication in simple sliding circular contacts

Wang

Kaneta

2007

Proceedings of the Institution of Mechanical Engineers, Part J:

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Numerical analyses based on Newtonian and Eyring fluid models are carried out to simulate the effects of inlet oil starvation in thermal elastohydrodynamic lubrication (TEHL) point contacts. It is assumed that the surface with transverse roughness is stationary and smooth surface is moving. Results of smooth TEHL contacts based on Newtonian fluid model are also presented as a reference. It is found that the temperature in the oil film increases suddenly at the inlet meniscus like the pressure build-up because of the discontinuous oil film at that boundary. The increasing degree of the inlet starvation raises the average temperature in the oil film for both smooth and rough contacts. The Newtonian maximum pressure and temperature for the rough contact occur at the macroscopic horseshoe-shaped constriction. Those of the Eyring fluid model still locate at the contact centre. As the degree of oil starvation increases, the differences in the pressure and film thickness distributions in rough elastohydrodynamic lubrication contacts between the Newtonian and Eyring fluid flow models decrease.

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“…3. D etermine the a pressure distrib ution by solving equation (21) and obtain the pressure distrib ution from equation (18). (24) and (28).…”

Section: The Overall Numerical Proceduresmentioning

confidence: 99%

A study of a journal bearing lubricated by couple stress fluids considering thermal and cavitation effects

Zhu

Gui

2002

Proceedings of the Institution of Mechanical Engineers, Part J:

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A theoretical study of a ®nite grooved journal bearing lubricated with couple stress¯uids is made considering both thermal and cavitation effects. On the basis of the Stokes couple stress¯uid model, the modi®ed Reynolds equation and the energy equation are derived and then numerically solved together with the heat conduction equation. The solution to the modi®ed R eynolds equation is determined using the Elrod cavitation algorithm. The effects of couple stress on the performance of a journal bearing are investigated. It is observed that the lubricants with couple stress, compared with N ewtonian lubricants, not only yield an obvious increase in load capacity and decrease in coef®cient of frictio n but also produce a slight increase in the temperature of lubricants and bush and a slight decrease in the side leakage¯ow.

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On the Numerical Analysis to the Thermoelastohydrodynamic Lubrication of a Tilting Pad Inclusive of Side Leakage

Cited by 27 publications

References 10 publications

Theoretical Evaluation of the Operational Characteristics in a Large Thrust Bearing

Theoretical Evaluation of the Operational Characteristics in a Large Thrust Bearing

A study on starved micro-thermal elastohydrodynamic lubrication in simple sliding circular contacts

A study of a journal bearing lubricated by couple stress fluids considering thermal and cavitation effects

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