垂直旋转圆盘边缘液体滑移率及液柱形态  

Liquid Slip Ratio and Ligament Morphology at Edge of Vertical Rotating Disc

作　　者：任伟[1] 覃文隆 REN Wei;QIN Wen-long(Chinese Flight Test Establishment, Xi’an 710089, China)

机构地区：[1]中国飞行试验研究院,西安710089

出　　处：《科学技术与工程》2022年第4期1678-1685,共8页Science Technology and Engineering

摘　　要：旋转圆盘表面液体与壁面之间存在切向相对滑移,液体的转速并不等于圆盘转速。利用高速摄影拍摄圆盘边缘液体形态,用软件Image J测量了液体的滑移率及液体头液滴与液柱的直径比。分析发现,垂直旋转圆盘不同区域的液体滑移率不同,随转速增加,各区域滑移率趋向相同,为10%~13%。圆盘表面的波动、边缘液体的形态会影响液体滑移率的大小,当液体形态为液膜时,滑移率大大增加,可达70%。头液滴与液柱的直径比随转速增加而下降,当转速达到3500 r/min后,直径比不再明显变化,保持在约1.5。头液滴直径与流量关系不大,随转速增加而减小,当转速达到4000 r/min后,不再明显变化,约为0.25 mm。There is a tangential relative slip between the liquid on the rotating disc and the wall,therefore the rotating speed of the liquid is not equal to the one of the disc.The high-speed camera was used to capture the liquid morphology at the vertical rotating disc and the software Image J was used to measure the liquid slip ratio and the diameter ratio of the head droplet to the liquid ligament.It is found that the liquid slip rate in different regions of the vertical rotating disc is different.But as the rotating speed increases,the slip rate in each region tends to be the same,finally from 10%to 13%.The fluctuation of the liquid on the surface of the disc and the liquid morphology at the edge of the disc affects the liquid slip rate.The slip rate increases up to 70%when the liquid forms a film.The diameter ratio of the head droplet to the liquid ligament decreases with the increase of the rotating speed.When the rotating speed reaches 3500 r/min,the diameter ratio no longer changes significantly,and remains at about 1.5.The diameter of the head droplet changes little with the flowrate,but decreases significantly with the increase of the rotating speed.When the rotating speed reaches 4000 r/min,it changes little,and finally at about 0.25 mm.

关 键 词：旋转雾化 垂直旋转圆盘 滑移率 液柱形态 

分 类 号：V231.23[航空宇航科学与技术—航空宇航推进理论与工程] TK16[动力工程及工程热物理—热能工程]