复合绝缘子不同部位水滴撞击特性及其影响因素

发布时间：2018-05-21 04:27

本文选题：流体力学 + 复合绝缘子　；参考：《电网技术》2014年05期

【摘要】：绝缘子各部位水滴撞击数不同其覆冰形态不同,为得到各因素对绝缘子不同部位水滴撞击特性的影响,建立风洞和复合绝缘子模型,将复合绝缘子分为伞上表面、伞下表面、伞边缘和芯棒4部分,研究水滴滴径、流速、气流倾角、温度等参数对绝缘子不同部位水滴撞击特性的影响,结果表明:滴径小于30μm时,水滴主要撞击在伞边缘和芯棒上,大于30μm后,水滴主要撞击在伞上表面;随流速增大,伞上表面水滴撞击数由增加趋势变为减小趋势,其临界水滴滴径为90μm,而伞边缘和芯棒水滴撞击数由增加趋势变为饱和,其临界滴径分别为30和50μm;水平气流时复合绝缘子水滴撞击数最少,气流从上至下时其水滴撞击率最大。滴径、流速和气流倾角对绝缘子局部水滴撞击特性均有较大影响且特点各异。
[Abstract]:In order to obtain the influence of various factors on the impact characteristics of water droplets in different parts of insulators, wind tunnel and composite insulator models are established. The composite insulators are divided into the upper surface of the umbrella and the surface under the umbrella. The effects of water drop diameter, flow rate, air flow angle and temperature on the impingement characteristics of water droplets in different parts of insulator are studied. The results show that when the drop diameter is less than 30 渭 m, the water droplets mainly impact on the edge of the umbrella and the mandrel. When the water droplets are larger than 30 渭 m, the water droplets mainly impact on the upper surface of the umbrella, and with the increase of flow velocity, the number of water droplets on the surface of the umbrella changes from an increasing trend to a decreasing trend, and the critical water drop diameter is 90 渭 m, while the impingement number of the water droplets on the edge of the umbrella and the mandrel becomes saturated from an increasing trend. The critical droplet diameters are 30 渭 m and 50 渭 m, respectively, and the water droplet impact rate of composite insulator is the least when the air flow is horizontal, and the water droplet impact rate of the composite insulator is the highest from top to bottom. The diameters, velocity and inclination of air flow have great influence on the impingement characteristics of local water droplets of insulators.
【作者单位】：华南理工大学电力学院;南方电网科学研究院有限责任公司;
【基金】：国家重点基础研究发展计划项目(973计划)(2009CB-724507)~~
【分类号】：TM216

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