Computation of the trajectory and attitude of arrows subject to background wind
Computation of the trajectory and attitude of arrows subject to background wind
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DOI：
10.1007/s12283-019-0302-9
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发表时间：
2019-03
影响因子：
1.7
通讯作者：
J. Ortiz;M. Ando;K. Murayama;T. Miyazaki;H. Sugiura
中科院分区：
文献类型：
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作者：
J. Ortiz;M. Ando;K. Murayama;T. Miyazaki;H. Sugiura
本文对背景风作用下射箭的运动轨迹和姿态进行了数值计算。研究了两种不同质量的商用箭的气动响应。如果箭是以零攻角和零角速度射出的，在均匀侧风的情况下，最大攻角增加。如果达到理想的初始条件，通过在整个飞行过程中保持边界层流，可以将最大攻角减小两个数量级。阻力与重力的比值在决定弹道偏差方面起着关键作用。在均匀侧风作用下，70m处轻箭与靶心的径向偏差分别为0.34m和0.26m，在边界层保持层流的情况下，轻箭和重箭的径向偏差分别减小到0.18m和0.12m。在相同的背景风条件下，较大的箭头与较轻的箭头相比，偏差较小。保持箭头的边界层层流可以显著减少风漂移，而与质量无关。
In this work are performed numerical computations of the trajectory and attitude of archery arrows under the influence of background wind. The aerodynamic response of two commercial arrows with different mass is investigated. The maximum angle of attack increases tounder a uniform side-wind of, if the arrow was shot with zero angle of attack and zero angular velocity. The maximum angle of attack can be reduced by two orders of magnitude by keeping the boundary layer laminar throughout the arrow’s flight if ideal initial conditions are achieved. The ratio of the drag force to the gravitational force plays a key role in determining the deviation in the trajectory. The radial deviation from the centre of the target for a uniform side-wind ofwas 0.34 m for the lighter arrow and 0.26 m for the heavier arrow at a distance of 70 m. The deviations decrease to 0.18 m and 0.12 m, for the lighter and the heavier arrow, respectively, if the boundary layers remain laminar. The heavier arrow shows a smaller deviation compared with the lighter arrow under identical background wind conditions. Keeping the arrow’s boundary layer laminar may reduce the wind drift significantly, regardless of the mass.