Simultaneous Measurement of Velocity and Pressure in a Wing-Tip Vortex
Simultaneous measurements of fluctuating velocity and pressure have been conducted in the near field of a wing-tip vortex trailing from a NACA0012 half wing. In the vortex core, the time-averaged streamwise velocity shows a wake-like profile which exhibits a deficit by approximately 25% of free stre...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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The Japan Society of Mechanical Engineers
2009-02-01
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| Series: | Journal of Fluid Science and Technology |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/jfst/4/1/4_1_107/_pdf/-char/en |
| _version_ | 1818753359005351936 |
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| author | Yoshitsugu NAKA Suguru AZEGAMI Takuya KAWATA Koji FUKAGATA Shinnosuke OBI |
| author_facet | Yoshitsugu NAKA Suguru AZEGAMI Takuya KAWATA Koji FUKAGATA Shinnosuke OBI |
| author_sort | Yoshitsugu NAKA |
| collection | DOAJ |
| description | Simultaneous measurements of fluctuating velocity and pressure have been conducted in the near field of a wing-tip vortex trailing from a NACA0012 half wing. In the vortex core, the time-averaged streamwise velocity shows a wake-like profile which exhibits a deficit by approximately 25% of free stream velocity. The meandering of the vortex is evident from both velocity and pressure measurements: The power spectral density (PSD) of the transverse velocity fluctuation increases in the lower frequency range, and the distribution of the pressure fluctuation exhibits an elongated shape in the z direction as well as two peaks slightly off from the vortex center. The distribution of the measured velocity-pressure correlation varies significantly near the center of the vortex especially in downstream locations. |
| first_indexed | 2024-12-18T05:06:06Z |
| format | Article |
| id | doaj.art-f44bf8dcf8a34b79bca9e9dd25adf005 |
| institution | Directory Open Access Journal |
| issn | 1880-5558 |
| language | English |
| last_indexed | 2024-12-18T05:06:06Z |
| publishDate | 2009-02-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Journal of Fluid Science and Technology |
| spelling | doaj.art-f44bf8dcf8a34b79bca9e9dd25adf0052022-12-21T21:20:00ZengThe Japan Society of Mechanical EngineersJournal of Fluid Science and Technology1880-55582009-02-014110711510.1299/jfst.4.107jfstSimultaneous Measurement of Velocity and Pressure in a Wing-Tip VortexYoshitsugu NAKA0Suguru AZEGAMI1Takuya KAWATA2Koji FUKAGATA3Shinnosuke OBI4Department of Mechanical Engineering, Keio UniversityDepartment of Mechanical Engineering, Keio UniversityDepartment of Mechanical Engineering, Keio UniversityDepartment of Mechanical Engineering, Keio UniversityDepartment of Mechanical Engineering, Keio UniversitySimultaneous measurements of fluctuating velocity and pressure have been conducted in the near field of a wing-tip vortex trailing from a NACA0012 half wing. In the vortex core, the time-averaged streamwise velocity shows a wake-like profile which exhibits a deficit by approximately 25% of free stream velocity. The meandering of the vortex is evident from both velocity and pressure measurements: The power spectral density (PSD) of the transverse velocity fluctuation increases in the lower frequency range, and the distribution of the pressure fluctuation exhibits an elongated shape in the z direction as well as two peaks slightly off from the vortex center. The distribution of the measured velocity-pressure correlation varies significantly near the center of the vortex especially in downstream locations.https://www.jstage.jst.go.jp/article/jfst/4/1/4_1_107/_pdf/-char/enwing-tip vortexfluctuating pressurevelocity-pressure correlation |
| spellingShingle | Yoshitsugu NAKA Suguru AZEGAMI Takuya KAWATA Koji FUKAGATA Shinnosuke OBI Simultaneous Measurement of Velocity and Pressure in a Wing-Tip Vortex Journal of Fluid Science and Technology wing-tip vortex fluctuating pressure velocity-pressure correlation |
| title | Simultaneous Measurement of Velocity and Pressure in a Wing-Tip Vortex |
| title_full | Simultaneous Measurement of Velocity and Pressure in a Wing-Tip Vortex |
| title_fullStr | Simultaneous Measurement of Velocity and Pressure in a Wing-Tip Vortex |
| title_full_unstemmed | Simultaneous Measurement of Velocity and Pressure in a Wing-Tip Vortex |
| title_short | Simultaneous Measurement of Velocity and Pressure in a Wing-Tip Vortex |
| title_sort | simultaneous measurement of velocity and pressure in a wing tip vortex |
| topic | wing-tip vortex fluctuating pressure velocity-pressure correlation |
| url | https://www.jstage.jst.go.jp/article/jfst/4/1/4_1_107/_pdf/-char/en |
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