Effect of micro protrusions on the performance of elliptical journal bearings operating with couple stress lubricant
Elliptical bearing is characterized by low induced temperature and high stability at higher speed in comparison with the cylindrical journal bearing. The performance of such bearings can be affected by the type of oil used and its surface properties. The main goal of this work is to study the surfac...
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| Format: | Article |
| Language: | English |
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Polskie Towarzystwo Diagnostyki Technicznej
2021-06-01
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| Series: | Diagnostyka |
| Subjects: | |
| Online Access: | http://www.diagnostyka.net.pl/Effect-of-micro-protrusions-on-the-performance-of-elliptical-journal-bearings-operating,136321,0,2.html |
| _version_ | 1811333031169884160 |
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| author | Basim Ajeel ِAbass Mushrek Alawi Mahdi |
| author_facet | Basim Ajeel ِAbass Mushrek Alawi Mahdi |
| author_sort | Basim Ajeel ِAbass |
| collection | DOAJ |
| description | Elliptical bearing is characterized by low induced temperature and high stability at higher speed in comparison with the cylindrical journal bearing. The performance of such bearings can be affected by the type of oil used and its surface properties. The main goal of this work is to study the surface micro protrusion effect on the steady state operation of elliptical journal bearing lubricated with a couple stress lubricant. The modified Reynolds’ equation to take into account the effects of couple stress lubricant and micro protrusions of the bearing surfaces is solved using finite difference method. The governing equations were solved using a prepared FORTRAN computer program. Pressure distribution, load carrying capacity and coefficient of friction have been studied for a bearing in the laminar flow regime. The mathematical model was validated by comparing pressure results for the elliptical bearing of the present work with that obtained by Hussain et al.(1996). The obtained results demonstrate that the lubricant pressure and the load carried by the bearing decrease for the bearing with higher ellipticity factor while the load carried by the bearing increases for the bearing with higher protrusions or when using a couple stress fluid with higher couple stress variable. |
| first_indexed | 2024-04-13T16:45:55Z |
| format | Article |
| id | doaj.art-cea1c62f0d1549aebec46a04a1145ab0 |
| institution | Directory Open Access Journal |
| issn | 2449-5220 |
| language | English |
| last_indexed | 2024-04-13T16:45:55Z |
| publishDate | 2021-06-01 |
| publisher | Polskie Towarzystwo Diagnostyki Technicznej |
| record_format | Article |
| series | Diagnostyka |
| spelling | doaj.art-cea1c62f0d1549aebec46a04a1145ab02022-12-22T02:39:05ZengPolskie Towarzystwo Diagnostyki TechnicznejDiagnostyka2449-52202021-06-012229710410.29354/diag/136321136321Effect of micro protrusions on the performance of elliptical journal bearings operating with couple stress lubricantBasim Ajeel ِAbass0Mushrek Alawi Mahdi1University of BabylonUniversity of Babylon, College of Engineering / Al-Musayab, Automobile Engineering Department, Babylon, Almusyab-IraqElliptical bearing is characterized by low induced temperature and high stability at higher speed in comparison with the cylindrical journal bearing. The performance of such bearings can be affected by the type of oil used and its surface properties. The main goal of this work is to study the surface micro protrusion effect on the steady state operation of elliptical journal bearing lubricated with a couple stress lubricant. The modified Reynolds’ equation to take into account the effects of couple stress lubricant and micro protrusions of the bearing surfaces is solved using finite difference method. The governing equations were solved using a prepared FORTRAN computer program. Pressure distribution, load carrying capacity and coefficient of friction have been studied for a bearing in the laminar flow regime. The mathematical model was validated by comparing pressure results for the elliptical bearing of the present work with that obtained by Hussain et al.(1996). The obtained results demonstrate that the lubricant pressure and the load carried by the bearing decrease for the bearing with higher ellipticity factor while the load carried by the bearing increases for the bearing with higher protrusions or when using a couple stress fluid with higher couple stress variable.http://www.diagnostyka.net.pl/Effect-of-micro-protrusions-on-the-performance-of-elliptical-journal-bearings-operating,136321,0,2.htmlnon-newtonian fluidshydrodynamic lubricationelliptical journal bearingmicro-protrusionscouple stress lubricant |
| spellingShingle | Basim Ajeel ِAbass Mushrek Alawi Mahdi Effect of micro protrusions on the performance of elliptical journal bearings operating with couple stress lubricant Diagnostyka non-newtonian fluids hydrodynamic lubrication elliptical journal bearing micro-protrusions couple stress lubricant |
| title | Effect of micro protrusions on the performance of elliptical journal bearings operating with couple stress lubricant |
| title_full | Effect of micro protrusions on the performance of elliptical journal bearings operating with couple stress lubricant |
| title_fullStr | Effect of micro protrusions on the performance of elliptical journal bearings operating with couple stress lubricant |
| title_full_unstemmed | Effect of micro protrusions on the performance of elliptical journal bearings operating with couple stress lubricant |
| title_short | Effect of micro protrusions on the performance of elliptical journal bearings operating with couple stress lubricant |
| title_sort | effect of micro protrusions on the performance of elliptical journal bearings operating with couple stress lubricant |
| topic | non-newtonian fluids hydrodynamic lubrication elliptical journal bearing micro-protrusions couple stress lubricant |
| url | http://www.diagnostyka.net.pl/Effect-of-micro-protrusions-on-the-performance-of-elliptical-journal-bearings-operating,136321,0,2.html |
| work_keys_str_mv | AT basimajeelabass effectofmicroprotrusionsontheperformanceofellipticaljournalbearingsoperatingwithcouplestresslubricant AT mushrekalawimahdi effectofmicroprotrusionsontheperformanceofellipticaljournalbearingsoperatingwithcouplestresslubricant |