On the Low Frequency Pressure Fluctuation in a 3/4 Open Jet Automotive Wind Tunnel
In the present research, a possible generation mechanism of low-frequency buffeting phenomenon based on a 1:15 open jet automotive wind tunnel was investigated. Evolution of vortex structures and pressure field in the plenum chamber have been visualized and analyzed by Large-eddy simulation (LES). I...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Isfahan University of Technology
2019-01-01
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| Series: | Journal of Applied Fluid Mechanics |
| Subjects: | |
| Online Access: | http://jafmonline.net/JournalArchive/download?file_ID=49498&issue_ID=1002 |
| _version_ | 1818238002000822272 |
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| author | Q. Jia Y. Zhu D. Bao M. M. Rashidi Z. Yang |
| author_facet | Q. Jia Y. Zhu D. Bao M. M. Rashidi Z. Yang |
| author_sort | Q. Jia |
| collection | DOAJ |
| description | In the present research, a possible generation mechanism of low-frequency buffeting phenomenon based on a 1:15 open jet automotive wind tunnel was investigated. Evolution of vortex structures and pressure field in the plenum chamber have been visualized and analyzed by Large-eddy simulation (LES). It is shown that the low frequency pressure fluctuation is caused by the large-scale structures and their interaction. Multiple proper orthogonal decomposition was adopted to analyze the flow field in the plenum chamber. The characteristic frequencies of the vortex-rings after pairing is the same as the dominant resonance of buffeting at this wind velocity. |
| first_indexed | 2024-12-12T12:34:43Z |
| format | Article |
| id | doaj.art-c47443cdcd184a8184237750bf4c8dfc |
| institution | Directory Open Access Journal |
| issn | 1735-3572 |
| language | English |
| last_indexed | 2024-12-12T12:34:43Z |
| publishDate | 2019-01-01 |
| publisher | Isfahan University of Technology |
| record_format | Article |
| series | Journal of Applied Fluid Mechanics |
| spelling | doaj.art-c47443cdcd184a8184237750bf4c8dfc2022-12-22T00:24:21ZengIsfahan University of TechnologyJournal of Applied Fluid Mechanics1735-35722019-01-0112513591369.On the Low Frequency Pressure Fluctuation in a 3/4 Open Jet Automotive Wind TunnelQ. Jia0Y. Zhu1D. Bao2M. M. Rashidi3Z. Yang4Shanghai Automotive Wind Tunnel Center, Tongji University, Shanghai, 201804, ChinaShanghai Automotive Wind Tunnel Center, Tongji University, Shanghai, 201804, ChinaShanghai Automotive Wind Tunnel Center, Tongji University, Shanghai, 201804, ChinaDepartment of Civil Engineering, School of Engineering, University of Birmingham, Birmingham, UKShanghai Automotive Wind Tunnel Center, Tongji University, Shanghai, 201804, ChinaIn the present research, a possible generation mechanism of low-frequency buffeting phenomenon based on a 1:15 open jet automotive wind tunnel was investigated. Evolution of vortex structures and pressure field in the plenum chamber have been visualized and analyzed by Large-eddy simulation (LES). It is shown that the low frequency pressure fluctuation is caused by the large-scale structures and their interaction. Multiple proper orthogonal decomposition was adopted to analyze the flow field in the plenum chamber. The characteristic frequencies of the vortex-rings after pairing is the same as the dominant resonance of buffeting at this wind velocity.http://jafmonline.net/JournalArchive/download?file_ID=49498&issue_ID=1002Wind tunnel; Buffeting; LES; PIV; POD. |
| spellingShingle | Q. Jia Y. Zhu D. Bao M. M. Rashidi Z. Yang On the Low Frequency Pressure Fluctuation in a 3/4 Open Jet Automotive Wind Tunnel Journal of Applied Fluid Mechanics Wind tunnel; Buffeting; LES; PIV; POD. |
| title | On the Low Frequency Pressure Fluctuation in a 3/4 Open Jet Automotive Wind Tunnel |
| title_full | On the Low Frequency Pressure Fluctuation in a 3/4 Open Jet Automotive Wind Tunnel |
| title_fullStr | On the Low Frequency Pressure Fluctuation in a 3/4 Open Jet Automotive Wind Tunnel |
| title_full_unstemmed | On the Low Frequency Pressure Fluctuation in a 3/4 Open Jet Automotive Wind Tunnel |
| title_short | On the Low Frequency Pressure Fluctuation in a 3/4 Open Jet Automotive Wind Tunnel |
| title_sort | on the low frequency pressure fluctuation in a 3 4 open jet automotive wind tunnel |
| topic | Wind tunnel; Buffeting; LES; PIV; POD. |
| url | http://jafmonline.net/JournalArchive/download?file_ID=49498&issue_ID=1002 |
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