Aerodynamics on the unique flight path of soft tennis balls

Abstract

Fluid analysis is indispensable in recent ball game. Even in soft tennis balls are flying while rotating, so that various ballistic changes can be seen. Basically ballistic is as expected by the batter, but sometimes balls that take long-time trajectory (unique flight) to emerge will emerge. Therefore, in this study, we aimed to observe and examine the force occurring in the unique flight behavior and its occurrence range aerodynamically, and usually we analyzed the difference of trajectory of unique flight by high speed photographing. As a result, it was confirmed that a negative Magnus force was generated in the case of unique flight.