Inviscid and Viscous Interactions in Subsonic Corner Flows
A flap can be used as a high-lift device, in which a downward deflection results in a gain in lift at a given geometric angle of attack. To characterize the aerodynamic performance of a deflected surface in compressible flows, the present study examines a naturally developed turbulent boundary layer...
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| Format: | Article |
| Language: | English |
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Wiley
2013-01-01
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| Series: | The Scientific World Journal |
| Online Access: | http://dx.doi.org/10.1155/2013/940862 |
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| _version_ | 1832556681543811072 |
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| author | Kung-Ming Chung Po-Hsiung Chang Keh-Chin Chang |
| author_facet | Kung-Ming Chung Po-Hsiung Chang Keh-Chin Chang |
| author_sort | Kung-Ming Chung |
| collection | DOAJ |
| description | A flap can be used as a high-lift device, in which a downward deflection results in a gain in lift at a given geometric angle of attack. To characterize the aerodynamic performance of a deflected surface in compressible flows, the present study examines a naturally developed turbulent boundary layer past the convex and concave corners. This investigation involves the analysis of mean and fluctuating pressure distributions. The results obtained indicate strong inviscid-viscous interactions. There are upstream expansion and downstream compression for the convex-corner flows, while the opposite trend is observed for the concave-corner flows. A combined flow similarity parameter, based on the small perturbation theory, is proposed to scale the flow characteristics in both subsonic convex- and concave-corner flows. |
| format | Article |
| id | doaj-art-72ac485eec4049e0b1c4b19a54a74675 |
| institution | Kabale University |
| issn | 1537-744X |
| language | English |
| publishDate | 2013-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | The Scientific World Journal |
| spelling | doaj-art-72ac485eec4049e0b1c4b19a54a746752025-02-03T05:44:43ZengWileyThe Scientific World Journal1537-744X2013-01-01201310.1155/2013/940862940862Inviscid and Viscous Interactions in Subsonic Corner FlowsKung-Ming Chung0Po-Hsiung Chang1Keh-Chin Chang2Aerospace Science and Technology Research Centre, National Cheng Kung University, Tainan 711, TaiwanInstitute of Aeronautics and Astronautics, National Cheng Kung University, Tainan 711, TaiwanInstitute of Aeronautics and Astronautics, National Cheng Kung University, Tainan 711, TaiwanA flap can be used as a high-lift device, in which a downward deflection results in a gain in lift at a given geometric angle of attack. To characterize the aerodynamic performance of a deflected surface in compressible flows, the present study examines a naturally developed turbulent boundary layer past the convex and concave corners. This investigation involves the analysis of mean and fluctuating pressure distributions. The results obtained indicate strong inviscid-viscous interactions. There are upstream expansion and downstream compression for the convex-corner flows, while the opposite trend is observed for the concave-corner flows. A combined flow similarity parameter, based on the small perturbation theory, is proposed to scale the flow characteristics in both subsonic convex- and concave-corner flows.http://dx.doi.org/10.1155/2013/940862 |
| spellingShingle | Kung-Ming Chung Po-Hsiung Chang Keh-Chin Chang Inviscid and Viscous Interactions in Subsonic Corner Flows The Scientific World Journal |
| title | Inviscid and Viscous Interactions in Subsonic Corner Flows |
| title_full | Inviscid and Viscous Interactions in Subsonic Corner Flows |
| title_fullStr | Inviscid and Viscous Interactions in Subsonic Corner Flows |
| title_full_unstemmed | Inviscid and Viscous Interactions in Subsonic Corner Flows |
| title_short | Inviscid and Viscous Interactions in Subsonic Corner Flows |
| title_sort | inviscid and viscous interactions in subsonic corner flows |
| url | http://dx.doi.org/10.1155/2013/940862 |
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