袖珍云闪电磁仿真特性研究  

Numerical Simulation of Compact Intracloud Discharges and Its Characteristic

作　　者：苑尚博[1] 马启明[1] 雷宇[1] 符思涛[1] 

机构地区：[1]中国科学院电工研究所,北京100190

出　　处：《科学技术与工程》2015年第32期117-120,151,共5页Science Technology and Engineering

摘　　要：袖珍云闪(CIDs:compact intracloud discharges)是一种特殊的云闪现象,与常规云闪放电相比有很多特殊性:辐射双极性脉冲并通常单独出现、电场持续时间短、高频辐射强等。通过对袖珍云闪放电模型的建立,根据麦克斯韦方程组推导了CIDs辐射电磁场的计算公式,仿真计算了袖珍云闪的电磁场波形;并与实测波形进行了对比分析。分析结果显示,经该模型计算的袖珍云闪的电磁场波形与实测结果有较好的一致性;并讨论了在放电过程中,放电位置、放电通道长度以及通道的倾斜角度对其电磁场波形特征的影响。Compact intracloud discharges is a special kind of lightning,which has a lot of particularity： the radiation field pulses produced by CIDs are single and referred to as narrow bipolar pulses; the waveforms have a short duration; the high frequency radiation is strong,etc. Model of CIDs was build and derived the calculation formula of CIDs radiated electromagnetic fields according to Maxwell＇s equations,simulate the electric field of CIDs and compared with the detected result. It shows that the simulation result has a good consistency with the real detected result. The discharge position,the discharge channel length and the angle＇s influence are also discussed to the feature of the electric field of CIDs.

关 键 词：袖珍云闪 电磁场特性 仿真分析 

分 类 号：P427.32[天文地球—大气科学及气象学]