Cavitation Growth Phenomena in Pure-Sliding Grease EHD Contacts
This article describes experimental and theoretical studies on the cavitation phenomena in the grease lubrication film under pure sliding elastohydrodynamic contact. In situ observation tests using the optical interferometry technique were conducted, and the growth of cavitation was captured using a...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2018-08-01
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| Series: | Lubricants |
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| Online Access: | http://www.mdpi.com/2075-4442/6/3/75 |
| _version_ | 1817992195276275712 |
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| author | Takefumi Otsu Romeo Glovnea Joichi Sugimura |
| author_facet | Takefumi Otsu Romeo Glovnea Joichi Sugimura |
| author_sort | Takefumi Otsu |
| collection | DOAJ |
| description | This article describes experimental and theoretical studies on the cavitation phenomena in the grease lubrication film under pure sliding elastohydrodynamic contact. In situ observation tests using the optical interferometry technique were conducted, and the growth of cavitation was captured using a high-speed camera. The results showed that the cavity grew in two stages, which was similar to the behavior in the base oil, and that the cavity growth rate in the initial stage was higher than that in the second stage. In the initial stage, the cavity growth time in the grease was longer than that in the base oil, and the cavity length after the growth depended on the base oil viscosity. It was also found in the test using diurea grease that small cavities were formed by the lumps of thickener. The cavity growth in the initial stage was discussed by numerical simulation of pressure distribution based on a simple rheological model. |
| first_indexed | 2024-04-14T01:23:13Z |
| format | Article |
| id | doaj.art-13f6ef05ac324b1fb4dfc845bff978dd |
| institution | Directory Open Access Journal |
| issn | 2075-4442 |
| language | English |
| last_indexed | 2024-04-14T01:23:13Z |
| publishDate | 2018-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Lubricants |
| spelling | doaj.art-13f6ef05ac324b1fb4dfc845bff978dd2022-12-22T02:20:32ZengMDPI AGLubricants2075-44422018-08-01637510.3390/lubricants6030075lubricants6030075Cavitation Growth Phenomena in Pure-Sliding Grease EHD ContactsTakefumi Otsu0Romeo Glovnea1Joichi Sugimura2Division of Mechatronics, Department of Innovative Engineering, Faculty of Science and Technology, Oita University, 700 Dannoharu, Oita 870-1192, JapanDepartment of Engineering and Design, University of Sussex, Brighton BN1 9RH, UKInternational Institute for Carbon-Neutral Energy Research, Kyushu University, Fukuoka 819-0395, JapanThis article describes experimental and theoretical studies on the cavitation phenomena in the grease lubrication film under pure sliding elastohydrodynamic contact. In situ observation tests using the optical interferometry technique were conducted, and the growth of cavitation was captured using a high-speed camera. The results showed that the cavity grew in two stages, which was similar to the behavior in the base oil, and that the cavity growth rate in the initial stage was higher than that in the second stage. In the initial stage, the cavity growth time in the grease was longer than that in the base oil, and the cavity length after the growth depended on the base oil viscosity. It was also found in the test using diurea grease that small cavities were formed by the lumps of thickener. The cavity growth in the initial stage was discussed by numerical simulation of pressure distribution based on a simple rheological model.http://www.mdpi.com/2075-4442/6/3/75cavitationelastohydrodynamic lubricationgreaserheologygas |
| spellingShingle | Takefumi Otsu Romeo Glovnea Joichi Sugimura Cavitation Growth Phenomena in Pure-Sliding Grease EHD Contacts Lubricants cavitation elastohydrodynamic lubrication grease rheology gas |
| title | Cavitation Growth Phenomena in Pure-Sliding Grease EHD Contacts |
| title_full | Cavitation Growth Phenomena in Pure-Sliding Grease EHD Contacts |
| title_fullStr | Cavitation Growth Phenomena in Pure-Sliding Grease EHD Contacts |
| title_full_unstemmed | Cavitation Growth Phenomena in Pure-Sliding Grease EHD Contacts |
| title_short | Cavitation Growth Phenomena in Pure-Sliding Grease EHD Contacts |
| title_sort | cavitation growth phenomena in pure sliding grease ehd contacts |
| topic | cavitation elastohydrodynamic lubrication grease rheology gas |
| url | http://www.mdpi.com/2075-4442/6/3/75 |
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