Development and application of the sports-fluid simulator system

运动流体模拟器系统的开发与应用

• 批准号: 17300200
• 负责人: ASAI Takeshi
• 金额: $ 4.74万
• 依托单位: University of Tsukuba
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2005
• 资助国家: 日本
• 起止时间: 2005 至 2006
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-17300200/
• 关键词: Fluid; Sport; Simulator; CFD; Ball; サッカー; ボール; LES; レイノルズ数; 乱流; 風洞; サッカーボール; 可視化; 境界層

In this study, we developed the sports-fluid simulator system on a personal super computer system using both of the wind tunnel experiment approach and the computer fluid dynamics approach. As typical examples of application for the sports-fluid simulator system, we analyzed sports technique from the points of view of fluid mechanics and fluid engineering and we tried to research and develop the sports equipments as sports balls and sports shoes. In the case of the fluid mechanical analysis of soccer ball, An incompressible unsteady analysis was performed using the finite volume method based on fully unstructured meshes with a commercial CFD code (FLUENT6.2, Fluent Inc.). The turbulent model of this study was Large Eddy Simulation (LES) model. The drag coefficient of non-spinning soccer ball in CFD was approximately 0.19 and that of wind tunnel test was about 0.15. It was observed that the large scale fluctuation was generated in the lift coefficient. In order to visualize the flow around the soccer ball during flight, a ball was coated as uniformly as possible with titanium tetrachloride. It seemed that the Strouhal number of wake near the real fright soccer ball was about 1.0 as similar as the high-mode value of a smooth sphere. After balls undergoing a knuckle effect were airborne, large scale fluctuations of the vortex trail were observed when the St was between 0.1 and 0.01.

在这项研究中，我们利用风洞实验方法和计算机流体动力学方法在个人超级计算机系统上开发了运动流体模拟器系统。作为运动流体模拟器系统的典型应用实例，我们从流体力学和流体工程的角度分析了运动技术，并尝试研发了运动球、运动鞋等运动器材。在足球的流体力学分析中，使用基于完全非结构化网格的有限体积法和商业CFD代码（FLUENT6.2，Fluent Inc.）进行了不可压缩非定常分析。本研究的湍流模型为大涡模拟（LES）模型。 CFD中非旋转足球的阻力系数约为0.19，风洞试验中的阻力系数约为0.15。观察到升力系数产生了大范围的波动。为了使足球在飞行过程中周围的流动可视化，球上尽可能均匀地涂有四氯化钛。看起来，真实恐怖足球附近的斯特劳哈尔尾流数大约为 1.0，与光滑球体的高模值相似。经历指节效应的球在空中飞行后，当St在0.1到0.01之间时，观察到涡迹的大规模波动。

项目成果

A STUDY ON AERODYNAMICS OF ATHLETIC SPIKE SHOES

钉鞋运动鞋空气动力学研究

• 发表时间: 2005
• 期刊: Proc. of The 7th Symposium on Footwear Biomechanics Vol. 10
• 作者: Takeshi Asai;Kazuya Seo;Takao Oda;Takeshi Orei
• 通讯作者: Takeshi Orei

高レイノルズ数で飛翔するサッカーボール後流の動態

高雷诺数足球飞行尾流的动力学

• 发表时间: 2006
• 期刊: 日本機械学会年次大会講演論文集 06-1 (2)
• 作者: 浅井武;瀬尾和哉;小林修
• 通讯作者: 小林修

The Behavior of a Football During a Free Kick

任意球期间足球的行为

• 发表时间: 2005
• 期刊: Proc. of the Fifth World Congress on Science and Football Vol. 5
• 作者: M.J.Carre;S.R.Goodwill;T.Asai;S.J.Haake
• 通讯作者: S.J.Haake

ワールドカップサッカーにおける流体工学

世界杯足球赛中的流体工程

• 发表时间: 2006
• 期刊: 日本機械学会年次大会講演資料集 06-1 (8)
• 作者: 浅井武;瀬尾和哉;小林修;浅井武;浅井武
• 通讯作者: 浅井武

The initial window of a successful kick for goal of rugby football

橄榄球成功踢球的初始窗口

• 发表时间: 2005
• 期刊: The Impact of Technology on Sport 1
• 作者: K.Seo;O.Kobayashi;S.Sakamoto;M.Murakami
• 通讯作者: M.Murakami