基于成核理论的水温对结冰黏附强度影响研究

飞机结冰会影响飞行安全，甚至导致严重的飞行事故。研究积冰与基底的黏附强度，可以为飞机防除冰系统的设计提供具体的指标要求。设计剪切黏附力测量实验平台，利用该实验平台测量基板在不同冻结用水初始温度下的结冰黏附力；采集水/冰在冻结过程中的温度变化，并通过成核理论分析实验现象，着重研究冻结用水的初始温度对黏附强度的影响。结果表明：冻结水温初始温度的增加会促进冰晶成核，进而提高黏附强度。

Effect of water temperature on ice adhesion strength based on nucleation theory

Aircraft icing will affect flight safety and sometimes cause serious flight accidents. It is of great significance to study the adhesion strength between icing and substrate, which can provide specific index requirements for aircraft anti-icing and deicing system. The adhesive strength is affected by many factors. This paper focuses on the effect of the initial temperature of frozen water used to freeze ice on the adhesion strength in the frozen ice experiment, and analyzes the variation law based on the nucleation theory. Firstly, based on the direct mechanical test method, an experimental platform for measuring the shear adhesion force was built. Then, the adhesion force of the substrate under different freezing temperatures was measured, and the temperature changes of water/ice during freezing were collected. Finally, the experimental phenomena are analyzed by nucleation theory. The results show that with the increase of initial temperature of freezing water, the shear adhesion strength between ice and aluminum plate increases gradually; With the increase of the initial temperature of freezing water, the degree of supercooling of water before freezing increases gradually; Different initial temperature of freezing water can change the nucleation barrier and nucleation rate by changing the undercooling degree, and finally affect the adhesion strength.