化工学报 ›› 2023, Vol. 74 ›› Issue (S1): 104-112.DOI: 10.11949/0438-1157.20221593
收稿日期:
2022-11-12
修回日期:
2022-12-25
出版日期:
2023-06-05
发布日期:
2023-09-27
通讯作者:
龚建英
作者简介:
吴馨(1996—),女,博士研究生,wx3119103247@stu.xjtu.edu.cn
基金资助:
Xin WU(), Jianying GONG(), Long JIN, Yutao WANG, Ruining HUANG
Received:
2022-11-12
Revised:
2022-12-25
Online:
2023-06-05
Published:
2023-09-27
Contact:
Jianying GONG
摘要:
实验研究了超声波激励下水平铝板表面液滴群的输运特性,探究了超声功率、初始液滴体积和疏水性对液滴群运动过程的影响。结果表明,液滴群运动聚结及蒸发时间均与超声功率呈负相关,而与初始液滴体积及表面接触角呈正相关。随着超声功率的增大,液滴群粒径分布更均匀,最小运动聚结时间为12 s,同时蒸发时间最多可缩短46 s。随着初始液滴体积的增大,液滴群粒径分布均匀性减弱但聚结现象增强。疏水表面不仅能优化液滴群粒径分布,还能增强运动聚结过程。与裸铝表面相比,疏水表面上液滴群运动聚结时间增加17 s左右,蒸发时间可延长62 s。研究证实超声波具有抑制结霜的可行性。
中图分类号:
吴馨, 龚建英, 靳龙, 王宇涛, 黄睿宁. 超声波激励下铝板表面液滴群输运特性的研究[J]. 化工学报, 2023, 74(S1): 104-112.
Xin WU, Jianying GONG, Long JIN, Yutao WANG, Ruining HUANG. Study on the transportation characteristics of droplets on the aluminium surface under ultrasonic excitation[J]. CIESC Journal, 2023, 74(S1): 104-112.
实验参数 | 仪器 | 量程 | 误差 |
---|---|---|---|
液滴体积/μl | 微量移液器 | 5~50 | ±0.1 |
空气温度/℃ | 温湿度传感器 | -40~70 | ±1 |
空气相对湿度/% | 温湿度传感器 | 20~90 | ±1 |
接触角/(°) | 接触角测量仪 | 0~180 | ±0.1 |
超声波功率/ W | 超声波发生器 | 0~60 | ±0.6 |
表1 实验参数误差分析
Table 1 Error analysis of experimental parameters
实验参数 | 仪器 | 量程 | 误差 |
---|---|---|---|
液滴体积/μl | 微量移液器 | 5~50 | ±0.1 |
空气温度/℃ | 温湿度传感器 | -40~70 | ±1 |
空气相对湿度/% | 温湿度传感器 | 20~90 | ±1 |
接触角/(°) | 接触角测量仪 | 0~180 | ±0.1 |
超声波功率/ W | 超声波发生器 | 0~60 | ±0.6 |
图4 功率为40 W的超声波作用下5 μl初始液滴生成的液滴群演变过程
Fig.4 The evolution process of droplets generated from the initial droplet with a volume of 5 μl under the action of ultrasonic wave with the power of 40 W
图5 功率为40 W的超声波作用下25 μl初始液滴生成的液滴群演变过程
Fig. 5 The evolution process of droplets generated from the initial droplet with a volume of 25 μl under the action of ultrasonic wave with the power of 40 W
图7 功率为40 W的超声波作用下疏水表面20 μl初始液滴生成的液滴群演化过程
Fig.7 The evolution process of droplets on the hydrophobic surface generated from the initial droplet with a volume of 20 μl under the action of ultrasonic wave with the power of 40 W
图8 不同超声功率下裸铝表面与疏水表面上液滴群各阶段时间的比较
Fig.8 Comparison of the time of each stage of droplets on bare aluminum surface and hydrophobic surface under different ultrasonic power
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