雷电流波形的观测及沿通道时空分布的数值模拟  

Observation and Numerical Simulation of Lightning Discharge Current Along the Lightning Channel

作　　者：张其林[1] 郄秀书[1] 张廷龙[2] 赵阳[2] 杨静[2] 

机构地区：[1]中国科学院大气物理研究所中层大气与全球环境探测实验室 [2]中国科学院寒区旱区环境与工程研究所,甘肃兰州730000

出　　处：《电子学报》2008年第9期1829-1832,共4页Acta Electronica Sinica

基　　金：公益性行业(气象)科研专项项目GYHY(No.QX200706022);国家杰出青年科学基金(No.40325013);中科院知识创新工程重要方向项目(No.KZCX2-YW-206)

摘　　要：2005年夏季在山东利用人工引发雷电技术,在放电通道底部测量到了微秒量级的10次回击电流波形.基于Diendorfer and Uman(DU)模式,本文对雷电回击电流波形沿通道的时空分布特征进行了数值模拟.结果表明,如果合理的选取参数,基于DU模式的模拟结果与光学观测结果基本一致;与其他模式相比,DU模式是更合理的.Artificially triggered lightning experiment was conducted in Shandong Province in the summer of 2005,10 return strokes current waveforms in microsecond time resolution have been obtained in the channel bottom. Based on the Diendorfer and U- man（DU） model, the current waveforms characteristics along the channel are simulated and discussed. It is found that the simulated current waveforms along the lightning channel are in agreement with the optical measurements when the two different discharge time constants are properly chosen; compared with other return stroke models, the DU model is more physically reasonable and more preferable.

关 键 词：人工引发雷电 雷电流 数值模拟 

分 类 号：TM863[电气工程—高电压与绝缘技术]