Flow Behavior Caused by Air Permeability of Ski Jumping Suit Fabric
The purpose of this study was to investigate the effect of the air permeability of ski jumping suit fabric on aerodynamic characteristics. In the study, four types of fabric with different air permeabilities were installed onto a fabric-clothed elliptic cylinder, and the flow behavior around its sur...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-06-01
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| Series: | Proceedings |
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| Online Access: | https://www.mdpi.com/2504-3900/49/1/109 |
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| author | Yuki Kataoka Hiroaki Hasegawa Masahide Murakami Kazuya Seo Shigeru Obayashi |
| author_facet | Yuki Kataoka Hiroaki Hasegawa Masahide Murakami Kazuya Seo Shigeru Obayashi |
| author_sort | Yuki Kataoka |
| collection | DOAJ |
| description | The purpose of this study was to investigate the effect of the air permeability of ski jumping suit fabric on aerodynamic characteristics. In the study, four types of fabric with different air permeabilities were installed onto a fabric-clothed elliptic cylinder, and the flow behavior around its surface was investigated through wind tunnel experiments. The stall was delayed by using the fabric with higher air permeability. The air flow permeated the surface of the elliptic cylinder through the fabric for the fabric with high air permeability. This air flowed out into the separation region through the fabric again, which suppress stall. The stall characteristics for the fabric-clothed elliptic cylinder were influenced by the air permeability of the fabric. The boundary layer thickness on the outer surface and the turbulence levels of the boundary layer affected the air permeability of the fabric. The higher air permeability fabrics improved the stall characteristics. |
| first_indexed | 2024-03-10T19:10:02Z |
| format | Article |
| id | doaj.art-47245455c84442cf85519db89b296e53 |
| institution | Directory Open Access Journal |
| issn | 2504-3900 |
| language | English |
| last_indexed | 2024-03-10T19:10:02Z |
| publishDate | 2020-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Proceedings |
| spelling | doaj.art-47245455c84442cf85519db89b296e532023-11-20T03:50:05ZengMDPI AGProceedings2504-39002020-06-0149110910.3390/proceedings2020049109Flow Behavior Caused by Air Permeability of Ski Jumping Suit FabricYuki Kataoka0Hiroaki Hasegawa1Masahide Murakami2Kazuya Seo3Shigeru Obayashi4Department of Mechanical & Intelligent Engineering, Utsunomiya University, 7-1-2 Yoto, Utsunomiya-shi, Tochigi 321-8585, JapanDepartment of Mechanical & Intelligent Engineering, Utsunomiya University, 7-1-2 Yoto, Utsunomiya-shi, Tochigi 321-8585, JapanProfessor Emeritus, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba, Ibaraki 305-8573, JapanFaculty of Science, Yamagata University, 4-12 Kojirakawa-machi, Yamagata-shi, Yamagata 990-8560, JapanInstitute of Fluid Science, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai-shi, Miyagi 980-8577, JapanThe purpose of this study was to investigate the effect of the air permeability of ski jumping suit fabric on aerodynamic characteristics. In the study, four types of fabric with different air permeabilities were installed onto a fabric-clothed elliptic cylinder, and the flow behavior around its surface was investigated through wind tunnel experiments. The stall was delayed by using the fabric with higher air permeability. The air flow permeated the surface of the elliptic cylinder through the fabric for the fabric with high air permeability. This air flowed out into the separation region through the fabric again, which suppress stall. The stall characteristics for the fabric-clothed elliptic cylinder were influenced by the air permeability of the fabric. The boundary layer thickness on the outer surface and the turbulence levels of the boundary layer affected the air permeability of the fabric. The higher air permeability fabrics improved the stall characteristics.https://www.mdpi.com/2504-3900/49/1/109ski jumping suitwind tunnel experimentair permeabilityfluid forcestall |
| spellingShingle | Yuki Kataoka Hiroaki Hasegawa Masahide Murakami Kazuya Seo Shigeru Obayashi Flow Behavior Caused by Air Permeability of Ski Jumping Suit Fabric Proceedings ski jumping suit wind tunnel experiment air permeability fluid force stall |
| title | Flow Behavior Caused by Air Permeability of Ski Jumping Suit Fabric |
| title_full | Flow Behavior Caused by Air Permeability of Ski Jumping Suit Fabric |
| title_fullStr | Flow Behavior Caused by Air Permeability of Ski Jumping Suit Fabric |
| title_full_unstemmed | Flow Behavior Caused by Air Permeability of Ski Jumping Suit Fabric |
| title_short | Flow Behavior Caused by Air Permeability of Ski Jumping Suit Fabric |
| title_sort | flow behavior caused by air permeability of ski jumping suit fabric |
| topic | ski jumping suit wind tunnel experiment air permeability fluid force stall |
| url | https://www.mdpi.com/2504-3900/49/1/109 |
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