Fluid Characteristics of Radial Hydrodynamic Bearings Using Supercritical Carbon Dioxide as Lubricant
Hydrodynamic journal bearings play a vital role in high-speed, heavy-load machinery. Their performance directly affects system efficiency and reliability. Supercritical carbon dioxide (S-CO<sub>2</sub>), with its favorable thermophysical properties, is a promising lubricant. This study f...
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| Format: | Article |
| Language: | English |
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MDPI AG
2025-06-01
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| Series: | Lubricants |
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| Online Access: | https://www.mdpi.com/2075-4442/13/6/271 |
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| author | Chengtao Niu Sung-Ki Lyu Yu-Ting Wu Zhen Qin Jie Zhang |
| author_facet | Chengtao Niu Sung-Ki Lyu Yu-Ting Wu Zhen Qin Jie Zhang |
| author_sort | Chengtao Niu |
| collection | DOAJ |
| description | Hydrodynamic journal bearings play a vital role in high-speed, heavy-load machinery. Their performance directly affects system efficiency and reliability. Supercritical carbon dioxide (S-CO<sub>2</sub>), with its favorable thermophysical properties, is a promising lubricant. This study focused on a four-oil-cavity hydrodynamic journal bearing using S-CO<sub>2</sub> as the working fluid. A numerical model was established in ANSYS Workbench 2024 R1 using a fluid–structure interaction (FSI) method. The model was validated through comparison with literature data. Parametric studies were conducted by varying radial clearance, eccentricity, inlet diameter, and oil cavity size. Results showed that reducing the oil cavity wrap angle enhanced load capacity. Larger inlet diameters improved lubrication but could increase deformation. An appropriate combination of inlet diameter and eccentricity effectively reduced shell deformation. These findings offer design guidance for S-CO<sub>2</sub>-lubricated bearings in high-speed applications. |
| format | Article |
| id | doaj-art-774b6ff28bc84e18aca1fab33b8e6f57 |
| institution | DOAJ |
| issn | 2075-4442 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Lubricants |
| spelling | doaj-art-774b6ff28bc84e18aca1fab33b8e6f572025-08-20T03:16:33ZengMDPI AGLubricants2075-44422025-06-0113627110.3390/lubricants13060271Fluid Characteristics of Radial Hydrodynamic Bearings Using Supercritical Carbon Dioxide as LubricantChengtao Niu0Sung-Ki Lyu1Yu-Ting Wu2Zhen Qin3Jie Zhang4School of Mechanical Engineering, Shandong University of Technology, Zibo 255049, ChinaSchool of Mechanical and Aerospace Engineering, Gyeongsang National University, Jinju-si 52828, Republic of KoreaSchool of Transportation and Vehicle Engineering, Shandong University of Technology, Zibo 255049, ChinaSchool of Mechanical Engineering, Shandong University of Technology, Zibo 255049, ChinaSchool of Mechanical Engineering, Nantong Institute of Technology, Nantong 226002, ChinaHydrodynamic journal bearings play a vital role in high-speed, heavy-load machinery. Their performance directly affects system efficiency and reliability. Supercritical carbon dioxide (S-CO<sub>2</sub>), with its favorable thermophysical properties, is a promising lubricant. This study focused on a four-oil-cavity hydrodynamic journal bearing using S-CO<sub>2</sub> as the working fluid. A numerical model was established in ANSYS Workbench 2024 R1 using a fluid–structure interaction (FSI) method. The model was validated through comparison with literature data. Parametric studies were conducted by varying radial clearance, eccentricity, inlet diameter, and oil cavity size. Results showed that reducing the oil cavity wrap angle enhanced load capacity. Larger inlet diameters improved lubrication but could increase deformation. An appropriate combination of inlet diameter and eccentricity effectively reduced shell deformation. These findings offer design guidance for S-CO<sub>2</sub>-lubricated bearings in high-speed applications.https://www.mdpi.com/2075-4442/13/6/271supercritical carbon dioxideradial hydrodynamic bearingsfluid–structure interactionhigh-speedshell deformationload capacity |
| spellingShingle | Chengtao Niu Sung-Ki Lyu Yu-Ting Wu Zhen Qin Jie Zhang Fluid Characteristics of Radial Hydrodynamic Bearings Using Supercritical Carbon Dioxide as Lubricant Lubricants supercritical carbon dioxide radial hydrodynamic bearings fluid–structure interaction high-speed shell deformation load capacity |
| title | Fluid Characteristics of Radial Hydrodynamic Bearings Using Supercritical Carbon Dioxide as Lubricant |
| title_full | Fluid Characteristics of Radial Hydrodynamic Bearings Using Supercritical Carbon Dioxide as Lubricant |
| title_fullStr | Fluid Characteristics of Radial Hydrodynamic Bearings Using Supercritical Carbon Dioxide as Lubricant |
| title_full_unstemmed | Fluid Characteristics of Radial Hydrodynamic Bearings Using Supercritical Carbon Dioxide as Lubricant |
| title_short | Fluid Characteristics of Radial Hydrodynamic Bearings Using Supercritical Carbon Dioxide as Lubricant |
| title_sort | fluid characteristics of radial hydrodynamic bearings using supercritical carbon dioxide as lubricant |
| topic | supercritical carbon dioxide radial hydrodynamic bearings fluid–structure interaction high-speed shell deformation load capacity |
| url | https://www.mdpi.com/2075-4442/13/6/271 |
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