種々の公式バレーボールの空力特性の違い

抄録

Volleyball is a sport that starts with a serve, so effective service is essential to win the game. he trajectory of the ball is complicatedly affected by the fluid force, which depends on the speed, spin speed, and panel shape. The ball of volleyball is changed every Olympics, and Mikasa's V200W and V300W are used in volleyball competitions. The difference is the way of processing, and we believe the winkle patterns which made physically has an effect on the aerodynamic properties of the ball. The surface roughness of each ball panel has significant effects on the flight trajectory, which influences the content and tactics of the game. In this research, we measured the change of the force applied to the ball when it is not rotating, and quantified the variable velocity range. By understanding the hydrodynamic characteristics of the ball, we aimed to obtain datas for the product development of balls, and the improvement of coaching ability.