Prediction model of volume average diameter and analysis of atomization characteristics in electrostatic atomization minimum quantity lubrication
Abstract Minimum quantity lubrication (MQL) is a relatively efficient and clean alternative to flooding workpiece machining. Electrostatic atomization has the merits of small droplet diameter, high uniformity of droplet size, and strong coating, hence its superiority to pneumatic atomization. Howeve...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2023-02-01
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| Series: | Friction |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/s40544-022-0734-2 |
| _version_ | 1828716721074077696 |
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| author | Dongzhou Jia Changhe Li Jiahao Liu Yanbin Zhang Min Yang Teng Gao Zafar Said Shubham Sharma |
| author_facet | Dongzhou Jia Changhe Li Jiahao Liu Yanbin Zhang Min Yang Teng Gao Zafar Said Shubham Sharma |
| author_sort | Dongzhou Jia |
| collection | DOAJ |
| description | Abstract Minimum quantity lubrication (MQL) is a relatively efficient and clean alternative to flooding workpiece machining. Electrostatic atomization has the merits of small droplet diameter, high uniformity of droplet size, and strong coating, hence its superiority to pneumatic atomization. However, as the current research hotspot, the influence of jet parameters and electrical parameters on the average diameter of droplets is not clear. First, by observing the shape of the liquid film at the nozzle outlet, the influence law of air pressure and voltage on liquid film thickness (h) and transverse and longitudinal fluctuations are determined. Then, the mathematical model of charged droplet volume average diameter (VAD) is constructed based on three dimensions of the liquid film, namely its thickness, transverse wavelength (λ h), and longitudinal wavelength (λ z). The model results under different working conditions are obtained by numerical simulation. Comparisons of the model results with the experimental VAD of the droplet confirm the error of the mathematical model to be less than 10%. The droplet diameter distribution span value Rosin-Rammler distribution span (R.S) and percentage concentrations of PM10 (particle size of less than 10 µm)/PM2.5 (particle size of less than 2.5 µm) under different working conditions are further analyzed. The results show that electrostatic atomization not only reduces the diameter distribution span of atomized droplets but also significantly inhibits the formation of PM10 and PM2.5 fine-suspension droplets. When the air pressure is 0.3 MPa, and the voltage is 40 kV, the percentage concentrations of PM10 and PM2.5 can be reduced by 80.72% and 92.05%, respectively, compared with that under the pure pneumatic atomization condition at 0.3 MPa. |
| first_indexed | 2024-03-12T14:16:35Z |
| format | Article |
| id | doaj.art-7b8136084fad42fd9231420bd94282bc |
| institution | Directory Open Access Journal |
| issn | 2223-7690 2223-7704 |
| language | English |
| last_indexed | 2024-03-12T14:16:35Z |
| publishDate | 2023-02-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Friction |
| spelling | doaj.art-7b8136084fad42fd9231420bd94282bc2023-08-20T11:21:01ZengSpringerOpenFriction2223-76902223-77042023-02-0111112107213110.1007/s40544-022-0734-2Prediction model of volume average diameter and analysis of atomization characteristics in electrostatic atomization minimum quantity lubricationDongzhou Jia0Changhe Li1Jiahao Liu2Yanbin Zhang3Min Yang4Teng Gao5Zafar Said6Shubham Sharma7School of Mechanical & Automotive Engineering, Qingdao University of TechnologySchool of Mechanical & Automotive Engineering, Qingdao University of TechnologyCollege of Mechanical Engineering and Automation, Liaoning University of TechnologyState Key Laboratory of Ultra-precision Machining Technology, Department of Industrial and Systems Engineering, The Hong Kong Polytechnic UniversitySchool of Mechanical & Automotive Engineering, Qingdao University of TechnologySchool of Mechanical & Automotive Engineering, Qingdao University of TechnologyCollege of Engineering, University of SharjahMechanical Engineering Department, University Center for Research and Development, Chandigarh UniversityAbstract Minimum quantity lubrication (MQL) is a relatively efficient and clean alternative to flooding workpiece machining. Electrostatic atomization has the merits of small droplet diameter, high uniformity of droplet size, and strong coating, hence its superiority to pneumatic atomization. However, as the current research hotspot, the influence of jet parameters and electrical parameters on the average diameter of droplets is not clear. First, by observing the shape of the liquid film at the nozzle outlet, the influence law of air pressure and voltage on liquid film thickness (h) and transverse and longitudinal fluctuations are determined. Then, the mathematical model of charged droplet volume average diameter (VAD) is constructed based on three dimensions of the liquid film, namely its thickness, transverse wavelength (λ h), and longitudinal wavelength (λ z). The model results under different working conditions are obtained by numerical simulation. Comparisons of the model results with the experimental VAD of the droplet confirm the error of the mathematical model to be less than 10%. The droplet diameter distribution span value Rosin-Rammler distribution span (R.S) and percentage concentrations of PM10 (particle size of less than 10 µm)/PM2.5 (particle size of less than 2.5 µm) under different working conditions are further analyzed. The results show that electrostatic atomization not only reduces the diameter distribution span of atomized droplets but also significantly inhibits the formation of PM10 and PM2.5 fine-suspension droplets. When the air pressure is 0.3 MPa, and the voltage is 40 kV, the percentage concentrations of PM10 and PM2.5 can be reduced by 80.72% and 92.05%, respectively, compared with that under the pure pneumatic atomization condition at 0.3 MPa.https://doi.org/10.1007/s40544-022-0734-2minimum quantity lubrication (MQL)electrostatic atomizationvolume average diameter (VAD)atomization characteristics |
| spellingShingle | Dongzhou Jia Changhe Li Jiahao Liu Yanbin Zhang Min Yang Teng Gao Zafar Said Shubham Sharma Prediction model of volume average diameter and analysis of atomization characteristics in electrostatic atomization minimum quantity lubrication Friction minimum quantity lubrication (MQL) electrostatic atomization volume average diameter (VAD) atomization characteristics |
| title | Prediction model of volume average diameter and analysis of atomization characteristics in electrostatic atomization minimum quantity lubrication |
| title_full | Prediction model of volume average diameter and analysis of atomization characteristics in electrostatic atomization minimum quantity lubrication |
| title_fullStr | Prediction model of volume average diameter and analysis of atomization characteristics in electrostatic atomization minimum quantity lubrication |
| title_full_unstemmed | Prediction model of volume average diameter and analysis of atomization characteristics in electrostatic atomization minimum quantity lubrication |
| title_short | Prediction model of volume average diameter and analysis of atomization characteristics in electrostatic atomization minimum quantity lubrication |
| title_sort | prediction model of volume average diameter and analysis of atomization characteristics in electrostatic atomization minimum quantity lubrication |
| topic | minimum quantity lubrication (MQL) electrostatic atomization volume average diameter (VAD) atomization characteristics |
| url | https://doi.org/10.1007/s40544-022-0734-2 |
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