Theoretical Evaluation of the Operational Characteristics in a Large Thrust Bearing

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...

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Autores principales:	Duriseti Srikanth, Kaushal Chaturvedi, Chenna Kesava Reddy
Formato:	article
Lenguaje:	EN
Publicado:	Japanese Society of Tribologists 2015
Materias:	non-dimensional convergence thermal load flow rate power loss Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/c1dab60209ef42bda2564754bb5b3469
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spelling	oai:doaj.org-article:c1dab60209ef42bda2564754bb5b34692021-11-05T09:22:14ZTheoretical Evaluation of the Operational Characteristics in a Large Thrust Bearing1881-219810.2474/trol.10.336https://doaj.org/article/c1dab60209ef42bda2564754bb5b34692015-11-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/trol/10/5/10_336/_pdf/-char/enhttps://doaj.org/toc/1881-2198In 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.Duriseti SrikanthKaushal ChaturvediChenna Kesava ReddyJapanese Society of Tribologistsarticlenon-dimensionalconvergencethermalloadflow ratepower lossPhysicsQC1-999Engineering (General). Civil engineering (General)TA1-2040Mechanical engineering and machineryTJ1-1570ChemistryQD1-999ENTribology Online, Vol 10, Iss 5, Pp 336-343 (2015)
institution	DOAJ
collection	DOAJ
language	EN
topic	non-dimensional convergence thermal load flow rate power loss Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
spellingShingle	non-dimensional convergence thermal load flow rate power loss Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999 Duriseti Srikanth Kaushal Chaturvedi Chenna Kesava Reddy Theoretical Evaluation of the Operational Characteristics in a Large Thrust Bearing
description	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.
format	article
author	Duriseti Srikanth Kaushal Chaturvedi Chenna Kesava Reddy
author_facet	Duriseti Srikanth Kaushal Chaturvedi Chenna Kesava Reddy
author_sort	Duriseti Srikanth
title	Theoretical Evaluation of the Operational Characteristics in a Large Thrust Bearing
title_short	Theoretical Evaluation of the Operational Characteristics in a Large Thrust Bearing
title_full	Theoretical Evaluation of the Operational Characteristics in a Large Thrust Bearing
title_fullStr	Theoretical Evaluation of the Operational Characteristics in a Large Thrust Bearing
title_full_unstemmed	Theoretical Evaluation of the Operational Characteristics in a Large Thrust Bearing
title_sort	theoretical evaluation of the operational characteristics in a large thrust bearing
publisher	Japanese Society of Tribologists
publishDate	2015
url	https://doaj.org/article/c1dab60209ef42bda2564754bb5b3469
work_keys_str_mv	AT durisetisrikanth theoreticalevaluationoftheoperationalcharacteristicsinalargethrustbearing AT kaushalchaturvedi theoreticalevaluationoftheoperationalcharacteristicsinalargethrustbearing AT chennakesavareddy theoreticalevaluationoftheoperationalcharacteristicsinalargethrustbearing
_version_	1718444434659475456

Theoretical Evaluation of the Operational Characteristics in a Large Thrust Bearing

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