Impact force of a low speed water droplet colliding on a solid surface
Impact force of a low speed water droplet colliding on a solid surface
复制标题
低速水滴碰撞固体表面的冲击力
DOI：
10.1063/1.4903316
复制
发表时间：
2014-12-07
影响因子：
3.2
通讯作者：
Lv, Qian
中科院分区：
文献类型：
--
作者：
Li, Jingyin;Zhang, Bin;Lv, Qian
利用高灵敏度压电式力传感器测量了低速水滴撞击轻质微小铝板时的冲击力。采用单自由度振动模型对测力信号的振荡进行了分析，并通过精心设计的实验验证了板的振动是导致力信号振荡的原因。力的数据是通过使用低通有限脉冲响应滤波器，并验证是可靠的。研究了撞击速度和液滴直径对撞击力的演化和峰值的影响。结果表明，液滴与实心球的碰撞过程在频谱和峰值力的幂函数上有很大的不同。液滴冲击更接近于塑性冲击，而另一种冲击行为更接近于弹性冲击。液滴尺寸对冲蚀的影响取决于冲击时间，其随液滴直径的增加而增加。在T...
The impact forces of the low-speed water droplet colliding on a light and tiny aluminum plate were measured by using a highly sensitive piezoelectric force transducer. The one-degree freedom vibration model was employed to analyze the oscillation of the measured force signals, and the plate vibration was confirmed as the cause through elaborately designed experiments. The force data were obtained by using the low-pass Finite Impulse Response filter and was verified to be reliable. The effects of impact velocity and diameter of droplets on the impact force evolutions and peak forces were investigated. The results revealed that the impact process of a liquid droplet is quite different from that of a solid ball in the frequency spectrum and in the power function of the peak force. The droplet impact is closer to a plastic impact, while the other behaves more nearly an elastic impact. The influence of droplet size on erosion is dependent on the impact time duration, which increases with droplet diameter. On t...