バドミントンシャトルコックの空力特性

（スロットが与える影響）

抄録

Nowadays, various ball games are amused in the world. Among them, in badminton, a unique type of ball which called shuttlecock is used. It's known that Shuttlecock is the fastest compared to various balls which used in sports. Furthermore, shuttlecock has high slowdown properties due to its special shapes. In sports, applying fluid mechanic in ball movement is very important in the development of sports. Thus, many researches on the aerodynamic characteristics of ball have been done. However, the effects of badminton shuttlecock to the aerodynamic characteristics are still unknown. Particularly, which shuttlecock's slot influence a drag coefficient are unknown. In this paper, the effect of the standard shuttlecock and shuttlecock without the slot on the aerodynamic characteristics are investigated by using wind tunnel experiment. Influence of the shuttlecock's three slots a drag coefficient are investigated by using wind tunnel experiment. In addition, verification experiment of flight trajectory in indoor facility were carried out. From the results, the drag coefficient was differ from the standard shuttlecock and shuttlecock without the slot. The drag coefficient of the standard shuttlecock was about 0.3 higher than shuttlecock without the slot. The drag coefficient of shuttlecock with the slot1 and slot2 was about 0.15 higher than shuttlecock without the slot. But, shuttlecock with the slot2 is about a little higher than shuttlecock with the slot1. In the shuttlecock's flight trajectory experiment results of confirmed that right rotation power increase as initial velocity become higher.