三维电晕放电模型的开发与应用

电晕放电是研究地闪过程和雷电预警的关键,而以往的模型多为二维模型或一维模型,且多以单个建筑物电晕放电为研究对象,因此建筑物(群)电晕放电的研究受到越来越多的关注,三维电晕放电模型的开发具有重要的意义。本文开发了考虑风场与忽略风场两种不同情况下的三维电晕放电模型,并通过应用于单针系统、双针系统以及九针系统,以证明本文模型的可靠性与准确性。相比于以往的二维或一维模型,三维模型使用起来更灵活,更能全面的获取空间参数和近地面空间的具体数据,且变网格划分的方法不仅可以实现对大模拟域中细小尖端的精细化模拟,还能扩大模拟域范围。

Development and Application of Three-Dimensional Corona Discharge Model

The corona discharge is the key to the study of ground lightning process and lightning warning, and most of the previous models are two-dimensional or one-dimensional models, and the corona discharge of a single building is the research object, therefore, more and more attention has been paid to the study of corona discharge in buildings, and the development of three-dimensional corona discharge model is of great significance. In this paper, three-dimensional corona discharge models considering wind field and ignoring wind field are developed, which are applied to single-needle system, double-needle system and nine-needle system, to prove the reliability and accuracy of the model. Compared with the previous two-dimensional or one-dimensional models, the three-dimensional model is more flexible and can obtain more comprehensive spatial parameters and specific data in near-ground space, moreover, the method of variable mesh can not only realize the fine simulation of the small tip in the large simulation domain, but also expand the simulation domain.