Trajectory analysis of a soccer ball
Trajectory analysis of a soccer ball
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DOI：
10.1119/1.3197187
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发表时间：
2009-11-01
影响因子：
0.9
通讯作者：
Carre, Matt J.
中科院分区：
文献类型：
--
作者：
Goff, John Eric;Carre, Matt J.
我们进行了实验，一个足球从机器上发射，而两个摄像头记录下了它的部分轨迹。阻力系数是通过对无自旋轨迹的距离测量获得的，在球的飞行过程中，阻力系数没有明显的变化。升力系数是根据球发射后的轨迹得到的，其中雷诺数和自旋参数变化不大。我们得到了以前没有得到的自旋参数的升力系数的两个值。我们用于分析轨迹的代码可以免费提供给教育工作者和学生。
We performed experiments in which a soccer ball was launched from a machine while two cameras recorded portions of its trajectory. Drag coefficients were obtained from range measurements for no-spin trajectories, for which the drag coefficient does not vary appreciably during the ball's flight. Lift coefficients were obtained from the trajectories immediately following the ball's launch, in which Reynolds number and spin parameter do not vary much. We obtain two values of the lift coefficient for spin parameters that had not been obtained previously. Our codes for analyzing the trajectories are freely available to educators and students.