水过冷到冰成核再到结冰是一个非常复杂的物理过程。认知过冷水与固体表面接触面积对结冰温度和成核率的影响对过冷物质储存、输运以及防冰表面设计等工程应用非常关键。而过冷水-壁面接触面积对于冰成核的影响至今仍不明确，尤其是当接触面积较大时。通过改变硅胶管和PVC纤维增强软管的长度改变接触面积的方式，实验研究了接触面积对管内过冷水结冰温度的影响。结果表明，接触面积变化将显著影响过冷水的结冰温度。根据实验获得的规律性变化结果建立了接触面积-过冷度预测模型，并利用实验结果对经典成核理论中的面积项进行了修正。修正后的成核率预测结果与实验中面积增长对成核的影响基本一致，且接触面积对成核率的影响并非目前认为的线性，而呈非线性。文中使用的研究方法和所提出的模型对未来工程中过冷水的利用以及为接触面积变化对成核影响的进一步研究都奠定了良好的基础。

It is a very complex physical process for water from supercooling to ice nucleation till freezing. Understanding the influence of the contact area between supercooled water and surface on the freezing temperature and nucleation rate is critical for engineering applications such as antiicing surface design and the supercooling preservation. However, the effect of contact area between supercooled water and surface on the nucleation is still unclear, especially when the contact area is large. The influence of the change in contact area on the freezing temperature of supercooled water in hoses is studied by changing the length of the silicone hose and the polyvinyl chloride hose. The results show that it affects the ice nucleation temperature in supercooled water obviously. A prediction model between the contact area and the supercooling degree is established based on the experimental results. Furthermore, the area term in the classical nucleation theory (CNT) is modified through experimental results and theoretical analyses. It is found that the influence of the contact area on nucleation rate is nonlinear according to the modified CNT equation, not linear as is currently understood. The method and the model presented in this paper lay a foundation for the efficient utilization of supercooled water in engineering and the further investigation on the influence of the contact area change on the nucleation.