The Influence of Golf Ball Dimples on Aerodynamic Characteristics
The Influence of Golf Ball Dimples on Aerodynamic Characteristics
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高尔夫球凹坑对空气动力特性的影响
DOI：
10.1016/j.proeng.2014.06.132
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
T. Mizota
中科院分区：
文献类型：
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作者：
Takeshi Naruo;T. Mizota
高尔夫球在飞行过程中受到空气动力的作用。为此目的，为了开发具有高性能的高尔夫球，重要的是分析高尔夫球的空气动力学特性。另一方面，由于高尔夫球表面凹坑形貌复杂，其对表面形貌的影响还没有得到详细的研究。因此，高尔夫球酒窝对气动特性的影响进行了研究，使用风洞和旋转装置。测量了具有不同深度凹坑的高尔夫球。结果发现，凹坑越浅，升力系数越大。而当凹坑深度较浅时，在低速（30 m/s以下）时，升力系数很小。当在各种初始条件下计算由驾驶员发射的高尔夫球轨迹时，在许多情况下，球的速度在轨迹的顶点上变得低于30 m/s，包括职业男性高尔夫球手和女性高尔夫球手。因此，如果30 m/s速度的升力系数变小，距离将变短。研究了在所有速度下都具有高升力系数的凹坑模式。结果发现，具有在大浅凹坑之间具有极小凹坑的凹坑图案的高尔夫球在所有速度下（包括低于30 m/s）具有高升力系数。为了研究产生这种结果的原因，进行了流动显示实验。通过产生烟雾对高尔夫球周围的流动进行可视化。采用高速摄像技术拍摄了流场图像，并进行了粒子图像测速分析。结果，高尔夫球之间的流线分布存在差异。
Aerodynamic forces act on a golf ball during flight. For that purpose in order to develop a golf ball with high performance, it is important to analyze aerodynamic characteristics of the golf ball. On the other hand, dimple pattern of a golf ball is complicate and the influence of dimples hasn’t been investigated in detail. Therefore the influence of golf ball dimples on aerodynamic characteristics was investigated using a wind tunnel and rotating device. Some golf balls whose dimples have different depths were measured. As a result, it was found that the shallower the dimple was, the larger the lift coefficient was. However, when the depth of the dimples was much shallower, the lift coefficient was extremely-little on the slow velocity, i.e. under 30m/s. When the golf ball trajectory which was launched with a driver was calculated under various initial conditions, the ball velocity became under 30 m/s over the vertex of the trajectory in many cases, including professional male golfers and female golfers. Therefore, if the lift coefficient of the velocity of 30m/s becomes smaller, distances will become shorter. Dimple patterns that had a high lift coefficient at all velocities was researched. As a result, it was found that a golf ball with a dimple pattern that has extremely small dimples between large shallow dimples has a high lift coefficient at all velocities, including under 30m/s. In order to investigate the cause of the results, a flow visualization experiment was conducted. Visualization of flow around a golf ball was conducted by generating smoke. Moreover pictures of flow were taken by high-speed video and analyzed by PIV (Particle Image Velocimetry). As a result, there was the difference in the streamline distribution between golf balls.