Abstract In this paper, contamination distribution results on 4 insulators surface as well as NSDD (non-soluble deposit density) in different test conditions were obtained. Further, contamination performances of 4 insulators were compared. Finally, contamination process was simulated by the Eulerian multiphase model based on computational fluid dynamics. Research results showed that: contamination performances of insulators were obviously affected by insulator structures, wind speed and RH (relative humidity). Contamination distribution is non-uniform on 4 insulators. Contamination degree of 4 insulators on leeward surface is greater than that of windward surface. NSDDB (NSDD of bottom surface) of disc shaped insulators is higher than NSDDT (NSDD of top surface), the opposite is true for shed shaped insulators. Besides, the saturated contamination characteristics of 4 insulators are different in saturated NSDD and saturated time. Wind speed and RH both have great influence on the insulators contamination. The increase of wind speed and RH will lead to higher NSDD. However, it is noteworthy that RH has little impact on NSDD of composite insulators. In addition, the numerical simulation based on computational fluid dynamics and experimental results in wind tunnel are in good agreement. So it is suggested that numerical simulation can be used to test the anti-pollution performance of insulators with different structures in different environments.

中文翻译：

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典型输电线路绝缘子污染特性的风洞模拟

摘要 本文获得了4种绝缘子表面的污染分布结果以及不同测试条件下的NSDD（非溶性沉积物密度）。此外，还比较了 4 种绝缘体的污染性能。最后，通过基于计算流体动力学的欧拉多相模型对污染过程进行了模拟。研究结果表明：绝缘子的污染性能明显受绝缘子结构、风速和RH（相对湿度）的影响。污染分布在 4 个绝缘体上不均匀。4个绝缘子背风面污染程度大于迎风面。圆盘形绝缘子的NSDDB（底面的NSDD）高于NSDDT（顶面的NSDD），伞裙形绝缘子的情况正好相反。除了，4种绝缘子的饱和污染特性在饱和NSDD和饱和时间上不同。风速和相对湿度对绝缘子的污染影响很大。风速和RH的增加将导致更高的NSDD。但值得注意的是，RH对复合绝缘子的NSDD影响不大。此外，基于计算流体动力学的数值模拟与风洞实验结果吻合良好。因此建议采用数值模拟方法测试不同结构绝缘子在不同环境下的抗污染性能。但值得注意的是，RH对复合绝缘子的NSDD影响不大。此外，基于计算流体动力学的数值模拟与风洞实验结果吻合良好。因此建议采用数值模拟方法测试不同结构绝缘子在不同环境下的抗污染性能。但值得注意的是，RH对复合绝缘子的NSDD影响不大。此外，基于计算流体动力学的数值模拟与风洞实验结果吻合良好。因此建议采用数值模拟方法测试不同结构绝缘子在不同环境下的抗污染性能。