학술논문
1103 Wind tunnel experiment of spinning soccer ball / 1103 回転飛翔するサッカーボールの空力測定システムの開発(回転軸方向の変化と風洞実験)(OS11-1 流体関連振動・騒音,OS11 流体関連振動・騒音)
Document Type
Journal Article
Author
Source
The Proceedings of the Fluids engineering conference. 2013, 01
Subject
Language
Japanese
ISSN
2424-2896
Abstract
Wind tunnel experiments were conducted to study the aerodynamic characteristics of the spinning soccer balls with variously oriented spinning axes, of which balls are observed in a real game. Ball suspension apparatus with the piano wire strings and a shaft-bearing system through a soccer ball are studied with the cautions to obtain good linearity of spring support, non-interference to the other independent directions and the higher natural frequency of the system. The smooth rotation of a ball was accomplished with well spinning technique of dynamic balance. The 3-components aerodynamic forces of spinning ball in the fundamental arrangement of the axis are reported with the flight path calculations compared with ball flight observation.