Static Load Characteristics of Hydrostatic Journal Bearings: Measurements and Predictions
Hydrostatic bearings for liquid rocket engine turbopumps provide distinctive advantages, including high load capacity even with low viscosity cryogenic fluid and extending life span by minimizing friction and wear between rotor and bearing surfaces. Application of hydrostatic bearings into turbopump...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-10-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/22/19/7466 |
| _version_ | 1797476921517277184 |
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| author | Howon Yi Hyunsung Jung Kyuman Kim Keun Ryu |
| author_facet | Howon Yi Hyunsung Jung Kyuman Kim Keun Ryu |
| author_sort | Howon Yi |
| collection | DOAJ |
| description | Hydrostatic bearings for liquid rocket engine turbopumps provide distinctive advantages, including high load capacity even with low viscosity cryogenic fluid and extending life span by minimizing friction and wear between rotor and bearing surfaces. Application of hydrostatic bearings into turbopumps demands a reliable test database with well-quantified operating parameters and experimentally validated accurate performance predictive tools. The present paper shows the comprehensive experimental data and validation of predicted static load characteristics of hydrostatic journal bearings lubricated with air, water, and liquid nitrogen. Extensive experiments for static load characteristics of hydrostatic bearings are conducted using a turbopump-rotor-bearing system simulator while increasing supply pressure (<i>P<sub>s</sub></i>) into the test bearings. The test results demonstrate notable effects of the test fluids and their temperatures, as well as <i>P<sub>s</sub></i>, on the bearing performance. In general, the measured bearing flow rate, rotor displacement, and stiffness of the test bearings steadily increase with <i>P<sub>s</sub></i>. The static load bearing characteristics predictions considering flow turbulence and compressibility matched well with the experimental results. The work with independent test data and engineering computational programs will further the implementation of hydrostatic bearings in high-performance turbopump shaft systems with improved efficiency and enhanced reusability of liquid rocket engine sub-systems. |
| first_indexed | 2024-03-09T21:10:37Z |
| format | Article |
| id | doaj.art-f2c64c6a9d03497099de1541e78ca86e |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-09T21:10:37Z |
| publishDate | 2022-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-f2c64c6a9d03497099de1541e78ca86e2023-11-23T21:49:39ZengMDPI AGSensors1424-82202022-10-012219746610.3390/s22197466Static Load Characteristics of Hydrostatic Journal Bearings: Measurements and PredictionsHowon Yi0Hyunsung Jung1Kyuman Kim2Keun Ryu3Department of Mechanical Design Engineering, Hanyang University, Seoul 04763, KoreaDepartment of Mechanical Design Engineering, Hanyang University, Seoul 04763, KoreaDepartment of Mechanical Design Engineering, Hanyang University, Seoul 04763, KoreaDepartment of Mechanical Engineering, Hanyang University, Ansan 15588, Gyeonggi-do, KoreaHydrostatic bearings for liquid rocket engine turbopumps provide distinctive advantages, including high load capacity even with low viscosity cryogenic fluid and extending life span by minimizing friction and wear between rotor and bearing surfaces. Application of hydrostatic bearings into turbopumps demands a reliable test database with well-quantified operating parameters and experimentally validated accurate performance predictive tools. The present paper shows the comprehensive experimental data and validation of predicted static load characteristics of hydrostatic journal bearings lubricated with air, water, and liquid nitrogen. Extensive experiments for static load characteristics of hydrostatic bearings are conducted using a turbopump-rotor-bearing system simulator while increasing supply pressure (<i>P<sub>s</sub></i>) into the test bearings. The test results demonstrate notable effects of the test fluids and their temperatures, as well as <i>P<sub>s</sub></i>, on the bearing performance. In general, the measured bearing flow rate, rotor displacement, and stiffness of the test bearings steadily increase with <i>P<sub>s</sub></i>. The static load bearing characteristics predictions considering flow turbulence and compressibility matched well with the experimental results. The work with independent test data and engineering computational programs will further the implementation of hydrostatic bearings in high-performance turbopump shaft systems with improved efficiency and enhanced reusability of liquid rocket engine sub-systems.https://www.mdpi.com/1424-8220/22/19/7466hydrostatic bearingsjournal bearingsstatic load characteristicsmeasurementspredictions |
| spellingShingle | Howon Yi Hyunsung Jung Kyuman Kim Keun Ryu Static Load Characteristics of Hydrostatic Journal Bearings: Measurements and Predictions Sensors hydrostatic bearings journal bearings static load characteristics measurements predictions |
| title | Static Load Characteristics of Hydrostatic Journal Bearings: Measurements and Predictions |
| title_full | Static Load Characteristics of Hydrostatic Journal Bearings: Measurements and Predictions |
| title_fullStr | Static Load Characteristics of Hydrostatic Journal Bearings: Measurements and Predictions |
| title_full_unstemmed | Static Load Characteristics of Hydrostatic Journal Bearings: Measurements and Predictions |
| title_short | Static Load Characteristics of Hydrostatic Journal Bearings: Measurements and Predictions |
| title_sort | static load characteristics of hydrostatic journal bearings measurements and predictions |
| topic | hydrostatic bearings journal bearings static load characteristics measurements predictions |
| url | https://www.mdpi.com/1424-8220/22/19/7466 |
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