The Effect of Surface Roughness on Thermohydrodynamic Performance in Misaligned Journal Bearings

In this work an approach has been developed to investigate the influence of surface roughness on thermohydrodynamic performance in aligned and misaligned journal bearings by considering an average flow model and deriving the shear flow factor for various roughness configurations, similar to the pres...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Mustafa Mohammed K., Basim Ajeel Abass
Formato:	article
Lenguaje:	EN
Publicado:	Al-Khwarizmi College of Engineering – University of Baghdad 2010
Materias:	Thermohydrodynamic performance surface roughness misalignment journal Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/17cd4445f7764891ae9e1e29d43d9c74
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:17cd4445f7764891ae9e1e29d43d9c74
record_format	dspace
spelling	oai:doaj.org-article:17cd4445f7764891ae9e1e29d43d9c742021-12-02T03:53:49ZThe Effect of Surface Roughness on Thermohydrodynamic Performance in Misaligned Journal Bearings1818-1171https://doaj.org/article/17cd4445f7764891ae9e1e29d43d9c742010-01-01T00:00:00Zhttp://www.iasj.net/iasj?func=fulltext&aId=2381https://doaj.org/toc/1818-1171In this work an approach has been developed to investigate the influence of surface roughness on thermohydrodynamic performance in aligned and misaligned journal bearings by considering an average flow model and deriving the shear flow factor for various roughness configurations, similar to the pressure flow factor. An average Reynolds equation for rough surfaces is defined in term of pressure and shear flow factors, which can be obtained by numerical flow simulation, though the use of measured or numerically generated rough surfaces. Reynolds, heat conduction and energy equations are solved simultaneously by using a suitable numerical technique (Finite Difference Method) to obtain the pressure and temperature distribution through the oil film thickness of the journal bearing. These equations are obtained for isotropic surfaces and for surfaces with directional patterns. The flow factors for these surfaces are expressed as empirical relations in term of normalized oil film thickness (h/σ) and surface characteristic (γ) defined as the ratio of x and z correlation lengths . The results of this approach showed increase in load carrying capacity and maximum pressure and decrease in maximum temperature in the case of stationary surface roughness (rough bearing and smooth journal) with transverse pattern. The results obtained through this work have been compared with that published by other works and found to be in a good agreement. Mustafa Mohammed K.Basim Ajeel AbassAl-Khwarizmi College of Engineering – University of BaghdadarticleThermohydrodynamic performancesurface roughnessmisalignmentjournalChemical engineeringTP155-156Engineering (General). Civil engineering (General)TA1-2040ENAl-Khawarizmi Engineering Journal, Vol 6, Iss 3, Pp 61-76 (2010)
institution	DOAJ
collection	DOAJ
language	EN
topic	Thermohydrodynamic performance surface roughness misalignment journal Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	Thermohydrodynamic performance surface roughness misalignment journal Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040 Mustafa Mohammed K. Basim Ajeel Abass The Effect of Surface Roughness on Thermohydrodynamic Performance in Misaligned Journal Bearings
description	In this work an approach has been developed to investigate the influence of surface roughness on thermohydrodynamic performance in aligned and misaligned journal bearings by considering an average flow model and deriving the shear flow factor for various roughness configurations, similar to the pressure flow factor. An average Reynolds equation for rough surfaces is defined in term of pressure and shear flow factors, which can be obtained by numerical flow simulation, though the use of measured or numerically generated rough surfaces. Reynolds, heat conduction and energy equations are solved simultaneously by using a suitable numerical technique (Finite Difference Method) to obtain the pressure and temperature distribution through the oil film thickness of the journal bearing. These equations are obtained for isotropic surfaces and for surfaces with directional patterns. The flow factors for these surfaces are expressed as empirical relations in term of normalized oil film thickness (h/σ) and surface characteristic (γ) defined as the ratio of x and z correlation lengths . The results of this approach showed increase in load carrying capacity and maximum pressure and decrease in maximum temperature in the case of stationary surface roughness (rough bearing and smooth journal) with transverse pattern. The results obtained through this work have been compared with that published by other works and found to be in a good agreement.
format	article
author	Mustafa Mohammed K. Basim Ajeel Abass
author_facet	Mustafa Mohammed K. Basim Ajeel Abass
author_sort	Mustafa Mohammed K.
title	The Effect of Surface Roughness on Thermohydrodynamic Performance in Misaligned Journal Bearings
title_short	The Effect of Surface Roughness on Thermohydrodynamic Performance in Misaligned Journal Bearings
title_full	The Effect of Surface Roughness on Thermohydrodynamic Performance in Misaligned Journal Bearings
title_fullStr	The Effect of Surface Roughness on Thermohydrodynamic Performance in Misaligned Journal Bearings
title_full_unstemmed	The Effect of Surface Roughness on Thermohydrodynamic Performance in Misaligned Journal Bearings
title_sort	effect of surface roughness on thermohydrodynamic performance in misaligned journal bearings
publisher	Al-Khwarizmi College of Engineering – University of Baghdad
publishDate	2010
url	https://doaj.org/article/17cd4445f7764891ae9e1e29d43d9c74
work_keys_str_mv	AT mustafamohammedk theeffectofsurfaceroughnessonthermohydrodynamicperformanceinmisalignedjournalbearings AT basimajeelabass theeffectofsurfaceroughnessonthermohydrodynamicperformanceinmisalignedjournalbearings AT mustafamohammedk effectofsurfaceroughnessonthermohydrodynamicperformanceinmisalignedjournalbearings AT basimajeelabass effectofsurfaceroughnessonthermohydrodynamicperformanceinmisalignedjournalbearings
_version_	1718401533441212416

The Effect of Surface Roughness on Thermohydrodynamic Performance in Misaligned Journal Bearings

Ejemplares similares