Ligament and Droplet Generation by Oil Film on a Rotating Disk
The lubrication and heat transfer designs of bearing chamber depend on an understanding of oil/air two-phase flow. As initial and boundary conditions, the characteristics of ligament and droplet generation by oil film on rotating parts have significant influence on the feasibility of oil/air two-pha...
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| Format: | Article |
| Language: | English |
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Wiley
2015-01-01
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| Series: | International Journal of Aerospace Engineering |
| Online Access: | http://dx.doi.org/10.1155/2015/769862 |
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| author | Hengchao Sun Guoding Chen Li’na Wang Fei Wang |
| author_facet | Hengchao Sun Guoding Chen Li’na Wang Fei Wang |
| author_sort | Hengchao Sun |
| collection | DOAJ |
| description | The lubrication and heat transfer designs of bearing chamber depend on an understanding of oil/air two-phase flow. As initial and boundary conditions, the characteristics of ligament and droplet generation by oil film on rotating parts have significant influence on the feasibility of oil/air two-phase flow analysis. An integrated model to predict the oil film flow, ligament number, and droplet Sauter mean diameter (SMD) of a rotating disk, which is an abstraction of the droplet generation sources in a bearing chamber, is developed based on the oil film force balance analysis and wave theory. The oil film thickness and velocity, ligaments number, and droplet SMD are calculated as functions of the rotating disk radius, rotational speed and oil volume flow rate and oil properties. The theoretical results show that the oil film thickness and SMD are decreased with an increasing rotational speed, while the radial, transverse velocities, and ligament number are increased. The oil film thickness, radial velocity, and SMD are increased with an increasing oil flow rate, but the transverse velocity and ligament number are decreased. A test facility is built for the investigation into the ligament number of a rotating disk, and the measurement of ligament number is carried out by means of a high speed photography. |
| format | Article |
| id | doaj-art-a713dce2a4d44a12b435756502ed7f09 |
| institution | Kabale University |
| issn | 1687-5966 1687-5974 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Aerospace Engineering |
| spelling | doaj-art-a713dce2a4d44a12b435756502ed7f092025-02-03T06:07:32ZengWileyInternational Journal of Aerospace Engineering1687-59661687-59742015-01-01201510.1155/2015/769862769862Ligament and Droplet Generation by Oil Film on a Rotating DiskHengchao Sun0Guoding Chen1Li’na Wang2Fei Wang3School of Mechanical Engineering, Northwestern Polytechnical University, Xi’an 710072, ChinaSchool of Mechanical Engineering, Northwestern Polytechnical University, Xi’an 710072, ChinaSchool of Mechanical Engineering, Northwestern Polytechnical University, Xi’an 710072, ChinaSchool of Mechanical Engineering, Northwestern Polytechnical University, Xi’an 710072, ChinaThe lubrication and heat transfer designs of bearing chamber depend on an understanding of oil/air two-phase flow. As initial and boundary conditions, the characteristics of ligament and droplet generation by oil film on rotating parts have significant influence on the feasibility of oil/air two-phase flow analysis. An integrated model to predict the oil film flow, ligament number, and droplet Sauter mean diameter (SMD) of a rotating disk, which is an abstraction of the droplet generation sources in a bearing chamber, is developed based on the oil film force balance analysis and wave theory. The oil film thickness and velocity, ligaments number, and droplet SMD are calculated as functions of the rotating disk radius, rotational speed and oil volume flow rate and oil properties. The theoretical results show that the oil film thickness and SMD are decreased with an increasing rotational speed, while the radial, transverse velocities, and ligament number are increased. The oil film thickness, radial velocity, and SMD are increased with an increasing oil flow rate, but the transverse velocity and ligament number are decreased. A test facility is built for the investigation into the ligament number of a rotating disk, and the measurement of ligament number is carried out by means of a high speed photography.http://dx.doi.org/10.1155/2015/769862 |
| spellingShingle | Hengchao Sun Guoding Chen Li’na Wang Fei Wang Ligament and Droplet Generation by Oil Film on a Rotating Disk International Journal of Aerospace Engineering |
| title | Ligament and Droplet Generation by Oil Film on a Rotating Disk |
| title_full | Ligament and Droplet Generation by Oil Film on a Rotating Disk |
| title_fullStr | Ligament and Droplet Generation by Oil Film on a Rotating Disk |
| title_full_unstemmed | Ligament and Droplet Generation by Oil Film on a Rotating Disk |
| title_short | Ligament and Droplet Generation by Oil Film on a Rotating Disk |
| title_sort | ligament and droplet generation by oil film on a rotating disk |
| url | http://dx.doi.org/10.1155/2015/769862 |
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