Effects of golf ball dimple surface occupancy, volume ratio and depth on aerodynamic characteristics during rotation

For golfers, the length of flight distance is very important for improving scores. Therefore, surface a golf ball provided with innumerable dents called dimples to improve distance. These can be characterized by dimple occupancy and volume ratio. we manufactured model balls in which was changed diameter number dimples, depth change Fifteen were designed using 3D CAD then printed. Using these balls, carried out lift drag measurements wind tunnel experiments. Then, trajectory simulation performed based on obtained experimental results, effects ratio elucidated. In rotating when shallow, i.e., D/d = 4.55 × 10–3, 80% or higher, lift-drag flying increased. However, depths 6.82 10–3 9.09 there almost no effect Furthermore, comparing two depths, bout 15% lower deeper dimples. With respect ratio, coefficient increased increasing The also highest range 11.0–12.0 10–3.