液滴撞击干燥倾斜壁面铺展实验研究

Experimental Study on Spread of Droplet Impacting on Dry Inclined Wall

通过高速摄影技术及像素分析方法对液滴撞击干燥倾斜壁面进行实验研究,分析了不同倾斜角及韦伯数(We)对液滴飞溅及铺展的影响,结果表明,倾斜角的增加有利于抑制飞溅的产生;We一定时,液滴的前铺展因子随着倾斜角的增加而增加,后铺展因子随着倾斜角的增加而减小;液滴的前后初始铺展速度均大于液滴的撞击速度,且随着倾斜角的增加而减小。

High-speed photography and pixel analysis methods are used to study the droplets impact on the inclined dried wall. The effects of different inclined angles and Weber number(We) on droplet splashing and spreading are analyzed. It is concluded that the increasing of the inclined angle is beneficial to suppress the droplet splashing;when the We is constant, the front spreading factor of the droplet increases with the increasing of the inclined angle, while the back spreading factor decreases with the increasing of the inclined angle;the front and back initial spreading velocity of the droplet is larger than the impact velocity of the droplet, and decreases with the increasing of the inclined angle.