基于随机放电模式对建筑物上行闪电的数值模拟

发布时间：2018-02-22 13:12

  本文关键词： 建筑物宽度 上行闪电 数值模拟 启动条件 传播影响　出处：《电瓷避雷器》2017年05期 　论文类型：期刊论文

【摘要】：为了研究建筑物宽度变化对于上行闪电传播的影响,采用了上行闪电的随机放电参数化方案,对上行闪电进行了二维高分辨率下的模拟。结果显示:(1)当上行闪电起始后单向通道垂直向上发展一段距离,通道比较暗,分支比较小;(2)上行闪电发展到达2 km左右后,闪电通道的大部分分支将会产生许多小的分叉,其中部分分叉将会在高电荷密度中心处出现,另一部分分叉则绕过高电荷密度中心,向水平方向延伸发展;(3)随着建筑物宽度增加,上行闪电的通道总步长、上行闪电的水平延伸、垂直延伸有所增加、垂直延伸距离在3.1km-3.4km范围内变化。对建筑物上行闪电起始位置的研究,能够对建筑物电涌保护器的安装、选型等工作提供科学的指导意义。
[Abstract]:In order to study the effect of building width change on uplink lightning propagation, a random discharge parameterization scheme is proposed. The two dimensional high resolution simulation of uplink lightning is carried out. The results show that: 1) when the uplink lightning starts, the one-way channel develops a distance vertically upward, the channel is dark, the branch is smaller, and the uplink lightning develops to about 2 km. Most branches of the lightning channel will produce many small bifurcations, some of which will occur at the center of high charge density, and some will bypass the center of high charge density. With the increase of the width of the building, the total step length of the uplink lightning passage, the horizontal extension of the uplink lightning, and the vertical extension of the uplink lightning increase. The vertical extension distance varies in the range of 3.1 km-3.4 km. The study of the starting position of the building's upward lightning can provide scientific guidance for the installation and selection of building surge protectors.
【作者单位】： 国网信阳供电公司;
【分类号】：P427.3;TU895
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本文编号：1524489