Research on Internal Flow Field Characteristics of Straight-Groove Texture Using Three-Dimensional Modeling
Surface texture modification is a reasonable strategy for improving the tribological property of friction pairs. The internal flow behavior of the surface texture significantly impacts its performance. In this study, a three-dimensional computational fluid dynamics (CFD) model is constructed to expl...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-08-01
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| Series: | Lubricants |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2075-4442/11/8/338 |
| _version_ | 1797584042946723840 |
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| author | Yulong Li Zhehao Zhang Yongyong He Jianbin Luo |
| author_facet | Yulong Li Zhehao Zhang Yongyong He Jianbin Luo |
| author_sort | Yulong Li |
| collection | DOAJ |
| description | Surface texture modification is a reasonable strategy for improving the tribological property of friction pairs. The internal flow behavior of the surface texture significantly impacts its performance. In this study, a three-dimensional computational fluid dynamics (CFD) model is constructed to explore the internal flow behavior of the straight-groove texture in the thrust bearing. The influences of the Reynolds number, depth ratio, and area ratio of the straight-groove texture on the internal flow behavior are systematically investigated. Furthermore, the streamline and tribological performance parameters are checked to reveal the mechanism of the groove texture influencing the tribological properties. It is found that the vortex and cavitation significantly affect the tribological performance of textured surfaces under hydrodynamic lubrication. The cavitation and upstream vortex areas increase with the Reynolds number, while the downstream vortex area shows a reverse trend. The increase in depth ratio strengthens the upstream and downstream vortexes while reducing the cavitation area. Additionally, a method is proposed to determine the location of the cavitation within the groove texture. Certain operating conditions create the optimal texture depth ratio and area ratio, which could maximize the load-carrying capacity (LCC) of the oil film, and the friction coefficient is relatively small. |
| first_indexed | 2024-03-10T23:47:40Z |
| format | Article |
| id | doaj.art-89b21d3f01c647f5a9dac9a34a55e064 |
| institution | Directory Open Access Journal |
| issn | 2075-4442 |
| language | English |
| last_indexed | 2024-03-10T23:47:40Z |
| publishDate | 2023-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Lubricants |
| spelling | doaj.art-89b21d3f01c647f5a9dac9a34a55e0642023-11-19T01:56:08ZengMDPI AGLubricants2075-44422023-08-0111833810.3390/lubricants11080338Research on Internal Flow Field Characteristics of Straight-Groove Texture Using Three-Dimensional ModelingYulong Li0Zhehao Zhang1Yongyong He2Jianbin Luo3State Key Laboratory of Tribology in Advanced Equipment, Tsinghua University, Beijing 100084, ChinaState Key Laboratory of Tribology in Advanced Equipment, Tsinghua University, Beijing 100084, ChinaState Key Laboratory of Tribology in Advanced Equipment, Tsinghua University, Beijing 100084, ChinaState Key Laboratory of Tribology in Advanced Equipment, Tsinghua University, Beijing 100084, ChinaSurface texture modification is a reasonable strategy for improving the tribological property of friction pairs. The internal flow behavior of the surface texture significantly impacts its performance. In this study, a three-dimensional computational fluid dynamics (CFD) model is constructed to explore the internal flow behavior of the straight-groove texture in the thrust bearing. The influences of the Reynolds number, depth ratio, and area ratio of the straight-groove texture on the internal flow behavior are systematically investigated. Furthermore, the streamline and tribological performance parameters are checked to reveal the mechanism of the groove texture influencing the tribological properties. It is found that the vortex and cavitation significantly affect the tribological performance of textured surfaces under hydrodynamic lubrication. The cavitation and upstream vortex areas increase with the Reynolds number, while the downstream vortex area shows a reverse trend. The increase in depth ratio strengthens the upstream and downstream vortexes while reducing the cavitation area. Additionally, a method is proposed to determine the location of the cavitation within the groove texture. Certain operating conditions create the optimal texture depth ratio and area ratio, which could maximize the load-carrying capacity (LCC) of the oil film, and the friction coefficient is relatively small.https://www.mdpi.com/2075-4442/11/8/338surface textureLCCCFDvortexcavitationmechanism |
| spellingShingle | Yulong Li Zhehao Zhang Yongyong He Jianbin Luo Research on Internal Flow Field Characteristics of Straight-Groove Texture Using Three-Dimensional Modeling Lubricants surface texture LCC CFD vortex cavitation mechanism |
| title | Research on Internal Flow Field Characteristics of Straight-Groove Texture Using Three-Dimensional Modeling |
| title_full | Research on Internal Flow Field Characteristics of Straight-Groove Texture Using Three-Dimensional Modeling |
| title_fullStr | Research on Internal Flow Field Characteristics of Straight-Groove Texture Using Three-Dimensional Modeling |
| title_full_unstemmed | Research on Internal Flow Field Characteristics of Straight-Groove Texture Using Three-Dimensional Modeling |
| title_short | Research on Internal Flow Field Characteristics of Straight-Groove Texture Using Three-Dimensional Modeling |
| title_sort | research on internal flow field characteristics of straight groove texture using three dimensional modeling |
| topic | surface texture LCC CFD vortex cavitation mechanism |
| url | https://www.mdpi.com/2075-4442/11/8/338 |
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