复杂气流环境中冰晶的融化特性是航空发动机防冰技术研究的关键，开展冰晶粒子融化特性的可视化实验研究是探究发动机积冰机理和提高飞行器安全性的重要手段。本文设计并搭建了微小悬浮冰晶融化特性可视化实验系统，提出了基于OpenCV的冰水相界面识别方法，开发了基于等效模型法的冰晶融化率计算程序。以体积为0.4~1.4 μL的球形冰晶粒子在壁面温度为5~35 ℃腔体内的融化过程作为研究对象，开展了冰晶融化特性实验研究，探究了温度、粒径对冰晶融化率的影响规律，基于实验数据拟合得到冰晶融化速率实验关联式。研究表明：冰晶融化率与时间基本呈线性关系；相较于温度，粒径对融化速率的影响更加明显；随着温度的升高，冰晶融化速率先快速增加后趋于平缓；当温度保持不变时，冰晶融化速率与粒径成反比；冰晶融化率较低时，冰芯容易发生“翻转”，从而导致冰晶融化率的测量值突变。该研究有助于深入理解冰晶相变换热机理，可为航空发动机内复杂气流环境下混合相冰晶积冰模型的优化提供理论依据。

The melting characteristics of ice crystals in complex airflow are crucial to the aircraft engine anti-icing technology. Visual experiments on the melting behavior of ice crystal particles play a vital role in exploring engine icing mechanisms and enhancing aircraft safety. In this study， we designed and established a visualization experimental system to examine the melting process of suspended minuscule ice crystals. An ice-water phase interface recognition method was proposed based on OpenCV， and a program to estimate the ice crystal melting rate was developed based on the equivalent model method. To carry out the experimental investigation of ice crystal melting characteristics， the melting process of spherical ice crystal particles with the volume ranging from 0.4 μL to 1.4 μL was conducted as study object in a closed chamber with the wall temperatures ranging from 5 °C to 35 °C. The effects of temperature and particle size on the melting rate of ice crystal were investigated， and an experimental correlation equation based on the collected experimental data was derived The results show that the ice crystal melting rate follows a linear relationship with time. The influence of enAI particle size on the melting rate is more significant than that of temperature. As temperature increases， the ice crystal melting rate first increases rapidly and then becomes gentle. When the temperature remains constant， the ice crystal melting rate is inversely proportional to the particle size. When the ice crystal melting rate is low， the ice core is prone to ‘flipping’， causing a sudden change in the measured melting rate of the ice crystal. This study contributes to a deeper understanding of the phase transition and heat transfer mechanisms of ice crystals and provide a theoretical basis for optimizing mixed-phase icing models under complex airflow environments within aircraft engines.