图3. (a)不同工况下液滴撞击固壁前的初始直径,其中空心方格为相机空间分辨率0.025 mm/pix时得到的液滴直径,空心圆是相机空间分辨率0.033 mm/pix时得到的液滴直径,虚线为平均初始直径$D_{0}=2.167$ mm;(b)液滴撞击速度与下落高度的关系图,点为实验值,曲线为自由落体理论值

Fig.3. (a) The measured initial diameter of droplets, the open squares and open circles represent measured diameters with spatial resolution of photo at 0.025 mm/pix and 0.033 mm/pix respectively. The dash line indicates the average diameter of droplets 2.167 mm; (b) The impact velocity of droplet compared with experiment data and free fall velocity theory