Enhancement of the anti-icing performance by surface modification during droplet impact on subcooled surfaces

IF 2.8 2区工程技术 Q2 ENGINEERING, MECHANICAL

Experimental Thermal and Fluid Science Pub Date : 2025-06-03 DOI:10.1016/j.expthermflusci.2025.111539

Xiaowei Yang, Xiaohua Liu, Hongyu Ge, Heyu Jin, Junnan Jiang

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引用次数: 0

Abstract

Icing phenomena during droplet impact on subcooled surfaces frequently cause economic losses and safety problems in industry. In this paper, the processes of droplet impact on subcooled flat surfaces were experimentally studied by high-speed camera technique. The results indicated that increases in Weber number (We) and surface subcooling (ΔT) were unfavorable to anti-icing on the copper surface. This was caused by shortening the icing delay time and icing time, while increasing the icing diameter. The connection between icing morphology and icing characteristics was established. Through surface modification, the copper surface was successfully converted into a superhydrophobic one. This superhydrophobic surface enhanced anti-icing performance by promoting droplet rebound or reducing the icing diameter. A critical formula for predicting droplet rebound under different We and ΔT was provided. Increasing both We and ΔT was unfavorable for droplet to leave the surface. When the droplet rebounded from the surface, the contact time increased slightly with ΔT, but was less significantly affected by We. When the droplet failed to rebound, the icing diameter increased with We and ΔT. However, it remained smaller than that on copper surfaces under the same conditions, which was beneficial for anti-icing. These findings provide valuable insights for the advancement of anti-icing technologies.

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液滴撞击过冷表面时表面改性提高抗冰性能

液滴撞击过冷表面时产生的结冰现象经常造成经济损失和工业安全问题。本文利用高速摄像技术对液滴在过冷平面上的撞击过程进行了实验研究。结果表明，韦伯数（We）和表面过冷度（ΔT）的增加不利于铜表面的防冰。这是由于缩短了结冰延迟时间和结冰时间，同时增加了结冰直径。建立了结冰形态与结冰特性之间的联系。通过表面改性，成功地将铜表面转化为超疏水表面。这种超疏水表面通过促进液滴回弹或减小结冰直径来增强抗结冰性能。给出了不同We和ΔT条件下液滴回弹预测的临界公式。增大We和ΔT均不利于液滴离开表面。当液滴从表面反弹时，与ΔT的接触时间略有增加，但受We的影响较小。当液滴反弹失败时，结冰直径随We和ΔT的增大而增大。但是，在相同条件下，它仍然比铜表面的小，这有利于防冰。这些发现为防冰技术的发展提供了有价值的见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Experimental Thermal and Fluid Science 工程技术-工程：机械

CiteScore

6.70

自引率

3.10%

发文量

159

审稿时长

34 days

期刊介绍： Experimental Thermal and Fluid Science provides a forum for research emphasizing experimental work that enhances fundamental understanding of heat transfer, thermodynamics, and fluid mechanics. In addition to the principal areas of research, the journal covers research results in related fields, including combined heat and mass transfer, flows with phase transition, micro- and nano-scale systems, multiphase flow, combustion, radiative transfer, porous media, cryogenics, turbulence, and novel experimental techniques.