CFD-Based Investigation of Static and Dynamic Pressure Effect in Aerostatic Bearings with Annular Grooves at High Speed
Based on the SST k-ω turbulence model, this study investigated the flow fields of annular groove and non-groove small-hole throttling aerostatic bearings (AGSTABs and STABs). It examined the formation mechanisms of static and dynamic pressure effects in both flow fields at high speed, evaluating how...
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| Format: | Article |
| Language: | English |
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MDPI AG
2025-01-01
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| Series: | Lubricants |
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| Online Access: | https://www.mdpi.com/2075-4442/13/2/46 |
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| author | Wentao Song Minggui Li Peng Cheng Decheng Wang Chenxi Shao Junying Zhou |
| author_facet | Wentao Song Minggui Li Peng Cheng Decheng Wang Chenxi Shao Junying Zhou |
| author_sort | Wentao Song |
| collection | DOAJ |
| description | Based on the SST k-ω turbulence model, this study investigated the flow fields of annular groove and non-groove small-hole throttling aerostatic bearings (AGSTABs and STABs). It examined the formation mechanisms of static and dynamic pressure effects in both flow fields at high speed, evaluating how parameters such as eccentricity, groove width ratio, and depth ratio influence the average load capacity and static and dynamic pressure effects. The findings show that STABs combine static and dynamic pressure effects at high speeds, while AGSTABs decouple them to enhance load capacity, simultaneously reducing vortex and backflow intensity. At low eccentricities, AGSTABs exhibit superior performance over STABs, achieving 20% higher average load capacity at 0.1 eccentricity. Additionally, increasing eccentricity enhances static and dynamic pressure effects in both bearings. A larger groove width ratio decreases the throttling efficiency and dynamic pressure, with pressure dropping from 3.5 MPa (static) to 1.6 MPa, and 6.3 MPa (dynamic) to 1.7 MPa respectively, at 30,000 RPM. In contrast, the depth ratio of annular groove has only a minor impact on static and dynamic pressure effects. |
| format | Article |
| id | doaj-art-d3fd8d9b229f40afa915c5b906b0a575 |
| institution | DOAJ |
| issn | 2075-4442 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Lubricants |
| spelling | doaj-art-d3fd8d9b229f40afa915c5b906b0a5752025-08-20T02:44:39ZengMDPI AGLubricants2075-44422025-01-011324610.3390/lubricants13020046CFD-Based Investigation of Static and Dynamic Pressure Effect in Aerostatic Bearings with Annular Grooves at High SpeedWentao Song0Minggui Li1Peng Cheng2Decheng Wang3Chenxi Shao4Junying Zhou5Yanqi Lake (Beijing) Institute of Basic Manufacturing Technology Research, China Academy of Machinery Science and Technology, Beijing 101400, ChinaChina Xinshidai Certification Body, Beijing 100022, ChinaYanqi Lake (Beijing) Institute of Basic Manufacturing Technology Research, China Academy of Machinery Science and Technology, Beijing 101400, ChinaYanqi Lake (Beijing) Institute of Basic Manufacturing Technology Research, China Academy of Machinery Science and Technology, Beijing 101400, ChinaYanqi Lake (Beijing) Institute of Basic Manufacturing Technology Research, China Academy of Machinery Science and Technology, Beijing 101400, ChinaYanqi Lake (Beijing) Institute of Basic Manufacturing Technology Research, China Academy of Machinery Science and Technology, Beijing 101400, ChinaBased on the SST k-ω turbulence model, this study investigated the flow fields of annular groove and non-groove small-hole throttling aerostatic bearings (AGSTABs and STABs). It examined the formation mechanisms of static and dynamic pressure effects in both flow fields at high speed, evaluating how parameters such as eccentricity, groove width ratio, and depth ratio influence the average load capacity and static and dynamic pressure effects. The findings show that STABs combine static and dynamic pressure effects at high speeds, while AGSTABs decouple them to enhance load capacity, simultaneously reducing vortex and backflow intensity. At low eccentricities, AGSTABs exhibit superior performance over STABs, achieving 20% higher average load capacity at 0.1 eccentricity. Additionally, increasing eccentricity enhances static and dynamic pressure effects in both bearings. A larger groove width ratio decreases the throttling efficiency and dynamic pressure, with pressure dropping from 3.5 MPa (static) to 1.6 MPa, and 6.3 MPa (dynamic) to 1.7 MPa respectively, at 30,000 RPM. In contrast, the depth ratio of annular groove has only a minor impact on static and dynamic pressure effects.https://www.mdpi.com/2075-4442/13/2/46small-hole throttling aerostatic bearingsannular groovestatic and dynamic pressure effectshigh speed |
| spellingShingle | Wentao Song Minggui Li Peng Cheng Decheng Wang Chenxi Shao Junying Zhou CFD-Based Investigation of Static and Dynamic Pressure Effect in Aerostatic Bearings with Annular Grooves at High Speed Lubricants small-hole throttling aerostatic bearings annular groove static and dynamic pressure effects high speed |
| title | CFD-Based Investigation of Static and Dynamic Pressure Effect in Aerostatic Bearings with Annular Grooves at High Speed |
| title_full | CFD-Based Investigation of Static and Dynamic Pressure Effect in Aerostatic Bearings with Annular Grooves at High Speed |
| title_fullStr | CFD-Based Investigation of Static and Dynamic Pressure Effect in Aerostatic Bearings with Annular Grooves at High Speed |
| title_full_unstemmed | CFD-Based Investigation of Static and Dynamic Pressure Effect in Aerostatic Bearings with Annular Grooves at High Speed |
| title_short | CFD-Based Investigation of Static and Dynamic Pressure Effect in Aerostatic Bearings with Annular Grooves at High Speed |
| title_sort | cfd based investigation of static and dynamic pressure effect in aerostatic bearings with annular grooves at high speed |
| topic | small-hole throttling aerostatic bearings annular groove static and dynamic pressure effects high speed |
| url | https://www.mdpi.com/2075-4442/13/2/46 |
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