抄録
The aerodynamic properties of an archery arrow are investigated experimentally and numerically. The boundary layer along A/C/E shaft (Easton) remains laminar in the Reynolds number range Re < 1.3 _ 10^4, while it becomes turbulent for Re > 1.8 × 10^4. In the transition range 1.3 × 10^4 < Re < 1:8 × 10^4, two values of drag coefficient CD are measured, i.e., about 1.5 (laminar) and about 2.6 (turbulent). We compute the trajectory and attitude of an arrow in free flight numerically, and the time evolution of the angle of attack is determined, whose influence on the boundary layer transition is discussed.
