甘油液滴与水平固壁面碰撞力的试验研究  

Experimental Study on Impact Force of Glycerol Droplets Impacting on a Horizontal Plate

作　　者：吕骞 张彬[1] 王文钰 艾欣 李景银[1] 郭朋华 LU Qian;ZHANG Bin;WANG Wen-Yu;AI Xin;LI Jing-Yin;GUO Peng-Hua(School of Energy and Power Engineering,Xi'an Jiaotong University,Xi'an 710049,China)

机构地区：[1]西安交通大学能源与动力工程学院,西安710049

出　　处：《工程热物理学报》2020年第6期1400-1405,共6页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.51276137,No.51406155);中国博士后科学基金资助项目(No.2016T90914)。

摘　　要：本文通过搭建液滴碰撞试验台,研究了甘油液滴分别撞击干燥水平壁面和带液滴壁面时碰撞力随时间的变化规律。研究结果显示:液滴撞击干燥壁面时,碰撞力峰值随碰撞速度与液滴直径的增大而增大;不同液滴直径与碰撞速度下的无因次碰撞力-无因次时间曲线明显贴近,无因次碰撞力峰值随液滴雷诺数增大而具有下降趋势;撞击带液滴壁面会使碰撞力峰值减小,碰撞力持续时间延长,液滴撞击带液滴壁面与干燥壁面的碰撞力峰值之比随碰撞速度增加先减小后趋于平缓。An experimental setup was developed to study the impact force evolutions of glycerin droplets colliding on a horizontal plate or the plate with a droplet on it.The results show that the peak impact force increases with the increasing of the droplet diameter and the impact velocity.The dimensionless impact force shows that all of the dimensionless impact force curves are close to each other.In addition,the dimensionless peak impact force decreases with the increase in the Re number.The peak impact force of a droplet impacting on a plate with a droplet on it is smaller than the peak impact force of a droplet impacting on a dry plate.In comparison with the case of a droplet impacting on a dry plate(case A),the peak force of a droplet impacting on a plate with a droplet(case B)is smaller,but the time duration of case B is longer.The peak force ratio of case B to case A decreases with the increase in the impact velocity at the low impact velocity,and then remains almost constant at the high impact velocity.

关 键 词：液滴碰撞 碰撞力 无因次力 带液滴壁面 

分 类 号：TK05[动力工程及工程热物理]