Ice accretion seriously degrades the insulation performance of insulators of power lines, causing flashover and tripping accidents and even resulting in large-scale power outage. Most of the existing research work about iced insulators focus on the electrical discharge and flashover characteristics instead of the ice accretion process. In this paper, CFD (Computational Fluid Dynamics) based parametric numerical study is carried out to investigate the ice accretion and its effects on FXBW4-220 composite insulators at different environmental and geometric conditions. To verify the numerical results, experimental study is also performed in the artificial climate chamber. Results show that the ice accretion on insulator increased with the augment of environmental parameters including V (wind velocity), T (atmospheric temperature), MVD (droplets median volume diameter) and LWC (liquid water content). A parametric geometric study is also performed to investigate its effects on ice accretion and suggestions are made on optimal geometric configuration for minimizing the ice accretion on insulators.

积冰会严重降低电源线绝缘子的绝缘性能，从而导致飞弧和跳闸事故，甚至导致大规模停电。现有的关于冰绝缘子的大多数研究工作都着重于放电和闪络特性，而不是积冰过程。本文基于CFD（计算流体动力学）进行了参数数值研究，研究了在不同环境和几何条件下结冰及其对FXBW4-220复合绝缘子的影响。为了验证数值结果，还在人工气候箱中进行了实验研究。结果表明，随着环境参数（包括V（风速），T（大气温度），MVD（液滴中位体积直径）和LWC（液态水含量）。还进行了参数几何研究，以研究其对积冰的影响，并提出了关于最佳几何构型的建议，以最大程度地减少绝缘子上的积冰。