Model of atomized droplets average particle size and verification of eco-friendly hybrid lubrication (CAMQL)
In the precision cutting of difficult-to-process metals, surface thermal damage to a workpiece is a significant technical challenge. Although clean minimum quantity lubrication (MQL) technology, which replaces traditional pouring cooling, is used, inadequate heat dissipation remains an issue. Cryoge...
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| Format: | Article |
| Language: | English |
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Tsinghua University Press
2025-05-01
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| Series: | Friction |
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| Online Access: | https://www.sciopen.com/article/10.26599/FRICT.2025.9440960 |
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| author | Mingzheng Liu Changhe Li Dongzhou Jia Xin Liu Yanbin Zhang Min Yang Xin Cui Teng Gao Yusuf Suleiman Dambatta Runze Li |
| author_facet | Mingzheng Liu Changhe Li Dongzhou Jia Xin Liu Yanbin Zhang Min Yang Xin Cui Teng Gao Yusuf Suleiman Dambatta Runze Li |
| author_sort | Mingzheng Liu |
| collection | DOAJ |
| description | In the precision cutting of difficult-to-process metals, surface thermal damage to a workpiece is a significant technical challenge. Although clean minimum quantity lubrication (MQL) technology, which replaces traditional pouring cooling, is used, inadequate heat dissipation remains an issue. Cryogenic air MQL (CAMQL), an eco-friendly technology, can enhance the heat transfer performance of the lubricating film in the cutting zone, offering excellent cooling and lubrication effects. However, the influence of jet and temperature parameters on the average particle size and distribution characteristics of atomized droplets is not well understood. This study first analyzes the evolution of lubricant physical properties and establishes a quantitative mapping relationship between cryogenic air temperature and physical parameters of lubricant. Next, the unstable fluctuation in the annular liquid film at the two-phase flow nozzle exit is observed and analyzed. A thickness model of annular liquid film is developed, revealing the effect of airflow field on the annular liquid film. Finally, a model for the average particle size of atomized droplets under CAMQL is established. Numerical analysis and validation experiments under different working conditions show that the measured values align with the theoretical values. Under an air pressure of 0.4 MPa and an air flow temperature of −50 °C, the droplet particle size is 133.5 μm, with an error of 8.2%. The effect of air pressure on particle size is greater than that of air flow temperature. Additionally, the distribution spans of droplet size under different conditions are analyzed, and the results demonstrated that low temperatures help shorten the interval between particle sizes and improve the relative uniformity of particle size distribution. This research provides a theoretical basis for the application of CAMQL technology in the cutting process. |
| format | Article |
| id | doaj-art-2e3676393b1d48809097150a08c1ab38 |
| institution | Kabale University |
| issn | 2223-7690 2223-7704 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Tsinghua University Press |
| record_format | Article |
| series | Friction |
| spelling | doaj-art-2e3676393b1d48809097150a08c1ab382025-08-20T03:53:38ZengTsinghua University PressFriction2223-76902223-77042025-05-01135944096010.26599/FRICT.2025.9440960Model of atomized droplets average particle size and verification of eco-friendly hybrid lubrication (CAMQL)Mingzheng Liu0Changhe Li1Dongzhou Jia2Xin Liu3Yanbin Zhang4Min Yang5Xin Cui6Teng Gao7Yusuf Suleiman Dambatta8Runze Li9Key Lab of Industrial Fluid Energy Conservation and Pollution Control, Ministry of Education, Qingdao University of Technology, Qingdao 266520, ChinaKey Lab of Industrial Fluid Energy Conservation and Pollution Control, Ministry of Education, Qingdao University of Technology, Qingdao 266520, ChinaCollege of Mechanical Engineering and Automation, Liaoning University of Technology, Jinzhou 121001, ChinaSchool of Mechanical Engineering, Dalian University of Technology, Dalian 116081, ChinaKey Lab of Industrial Fluid Energy Conservation and Pollution Control, Ministry of Education, Qingdao University of Technology, Qingdao 266520, ChinaKey Lab of Industrial Fluid Energy Conservation and Pollution Control, Ministry of Education, Qingdao University of Technology, Qingdao 266520, ChinaKey Lab of Industrial Fluid Energy Conservation and Pollution Control, Ministry of Education, Qingdao University of Technology, Qingdao 266520, ChinaKey Lab of Industrial Fluid Energy Conservation and Pollution Control, Ministry of Education, Qingdao University of Technology, Qingdao 266520, ChinaKey Lab of Industrial Fluid Energy Conservation and Pollution Control, Ministry of Education, Qingdao University of Technology, Qingdao 266520, ChinaSchool of Engineering, Department of Biomedical Engineering, Massachusetts Institute of Technology, Boston 02139, USAIn the precision cutting of difficult-to-process metals, surface thermal damage to a workpiece is a significant technical challenge. Although clean minimum quantity lubrication (MQL) technology, which replaces traditional pouring cooling, is used, inadequate heat dissipation remains an issue. Cryogenic air MQL (CAMQL), an eco-friendly technology, can enhance the heat transfer performance of the lubricating film in the cutting zone, offering excellent cooling and lubrication effects. However, the influence of jet and temperature parameters on the average particle size and distribution characteristics of atomized droplets is not well understood. This study first analyzes the evolution of lubricant physical properties and establishes a quantitative mapping relationship between cryogenic air temperature and physical parameters of lubricant. Next, the unstable fluctuation in the annular liquid film at the two-phase flow nozzle exit is observed and analyzed. A thickness model of annular liquid film is developed, revealing the effect of airflow field on the annular liquid film. Finally, a model for the average particle size of atomized droplets under CAMQL is established. Numerical analysis and validation experiments under different working conditions show that the measured values align with the theoretical values. Under an air pressure of 0.4 MPa and an air flow temperature of −50 °C, the droplet particle size is 133.5 μm, with an error of 8.2%. The effect of air pressure on particle size is greater than that of air flow temperature. Additionally, the distribution spans of droplet size under different conditions are analyzed, and the results demonstrated that low temperatures help shorten the interval between particle sizes and improve the relative uniformity of particle size distribution. This research provides a theoretical basis for the application of CAMQL technology in the cutting process.https://www.sciopen.com/article/10.26599/FRICT.2025.9440960cryogenic airminimum quantity lubrication (mql)atomizationaverage particle sizemathematical model |
| spellingShingle | Mingzheng Liu Changhe Li Dongzhou Jia Xin Liu Yanbin Zhang Min Yang Xin Cui Teng Gao Yusuf Suleiman Dambatta Runze Li Model of atomized droplets average particle size and verification of eco-friendly hybrid lubrication (CAMQL) Friction cryogenic air minimum quantity lubrication (mql) atomization average particle size mathematical model |
| title | Model of atomized droplets average particle size and verification of eco-friendly hybrid lubrication (CAMQL) |
| title_full | Model of atomized droplets average particle size and verification of eco-friendly hybrid lubrication (CAMQL) |
| title_fullStr | Model of atomized droplets average particle size and verification of eco-friendly hybrid lubrication (CAMQL) |
| title_full_unstemmed | Model of atomized droplets average particle size and verification of eco-friendly hybrid lubrication (CAMQL) |
| title_short | Model of atomized droplets average particle size and verification of eco-friendly hybrid lubrication (CAMQL) |
| title_sort | model of atomized droplets average particle size and verification of eco friendly hybrid lubrication camql |
| topic | cryogenic air minimum quantity lubrication (mql) atomization average particle size mathematical model |
| url | https://www.sciopen.com/article/10.26599/FRICT.2025.9440960 |
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