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A simple physical model for self-triggered upward leaders from high-rise buildings

机译：来自高层建筑的自触发向上领导人的简单物理模型

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摘要

This paper presents a simple physical model for an upward positive leader initiated from a tall grounded object. Characteristics such as the leader channel structure, leader initiation criteria, leaded propagation speed, leader current and channel longitudinal electric field are described and modelled step-by-step. Other parameters including the evolution of leader line charge density, leader core conductance and radius, and leader corona sheath radius are also computed and evaluated. Particularly, the minimum corona sheath radius and corona charge density for leader initiation and stable propagation based on existing experiment data are proposed. The model may serve as a virtual lab to study the initiation of an upward leader at the top of a tall ground structure for tall building lightning protection analysis.
机译：本文介绍了从高大的接地物体发起的向上积极领导的简单物理模型。描述和建模逐步描述诸如引导通道结构，领导发起标准，引导传播速度，引导电流和信道纵向电场的特性。还计算和评估包括引导线电荷密度，领导芯电导和半径的引导芯电导和半径的其他参数。特别地，提出了基于现有实验数据的领导启动和稳定传播的最小电晕鞘半径和电晕电荷密度。该模型可以用作虚拟实验室，用于研究高层建筑防雷分析高层地面结构顶部的向上引导的启动。

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