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Aerodynamic drag of modern soccer balls
http://hdl.handle.net/2241/119271
http://hdl.handle.net/2241/11927176e73d05-e22a-45dd-bd94-babbbb949588
名前 / ファイル | ライセンス | アクション |
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SP_2-1.pdf (1.1 MB)
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Item type | Journal Article(1) | |||||
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公開日 | 2013-05-24 | |||||
タイトル | ||||||
タイトル | Aerodynamic drag of modern soccer balls | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源 | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | journal article | |||||
著者 |
Asai, Takeshi
× Asai, Takeshi× Seo, Kazuya |
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著者別名 |
淺井, 武
× 淺井, 武 |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | Soccer balls such as the Adidas Roteiro that have been used in soccer tournaments thus far had 32 pentagonal and hexagonal panels. Recently, the Adidas Teamgeist II and Adidas Jabulani, respectively having 14 and 8 panels, have been used at tournaments; the aerodynamic characteristics of these balls have not yet been verified. Now, the Adidas Tango 12, having 32 panels, has been developed for use at tournaments; therefore, it is necessary to understand its aerodynamic characteristics. Through a wind tunnel test and ball trajectory simulations, this study shows that the aerodynamic resistance of the new 32-panel soccer ball is larger in the high-speed region and lower in the middle-speed region than that of the previous 14- and 8-panel balls. The critical Reynolds number of the Roteiro, Teamgeist II, Jabulani, and Tango 12 was ~2.2 × 105 (drag coefficient, Cd ≈ 0.12), ~2.8 × 105 (Cd ≈ 0.13), ~3.3 × 105 (Cd ≈ 0.13), and ~2.4 × 105 (Cd ≈ 0.15), respectively. The flight trajectory simulation suggested that the Tango 12, one of the newest soccer balls, has less air resistance in the medium-speed region than the Jabulani and can thus easily acquire large initial velocity in this region. It is considered that the critical Reynolds number of a soccer ball, as considered within the scope of this experiment, depends on the extended total distance of the panel bonds rather than the small designs on the panel surfaces. | |||||
書誌情報 |
SpringerPlus 巻 2, 号 1, p. 171, 発行日 2013-04 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 2193-1801 | |||||
DOI | ||||||
識別子タイプ | DOI | |||||
関連識別子 | 10.1186/2193-1801-2-171 | |||||
権利 | ||||||
権利情報 | © 2013 Asai and Seo; licensee Springer. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
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著者版フラグ | ||||||
値 | publisher | |||||
出版者 | ||||||
出版者 | Springer | |||||
URI | ||||||
識別子 | http://hdl.handle.net/2241/119271 | |||||
識別子タイプ | HDL |