摘要
主要基于实验室放电通道传输的基本机制,建立了一个闪电通道发展的数值模式,对区域的海拔高度对云地雷闪闪击距离的影响进行了模拟研究,结果表明,随着地面海拔高度的升高,由于地面电场的增强以及连接先导始发门限的降低,闪击距离将显著增大——在海拔高度由0增加到3km时,闪击距离增大约230m,增幅约150％。
Based on the basic mechanism of the leader initiation and propagation in long air gaps discharge, a model of the lightning channel development was proposed and the effect of the altitude above the sea level ( asl) of region to the striking distance in cloud-to-ground lightning discharge was numerically investigated, the result shows that the striking distance increases significantly with altitude of the region-increasing about 230m(150 percent)with 0 to 3km altitude variation, the main reason for which is due to the enhancement of the electrical field of the ground, and the lower pressure which reduces the critical electrical field.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2004年第2期88-91,共4页
Proceedings of the CSEE
基金
国家自然科学基金项目(40375004)
中国科学院知识创新工程重大基金项目(KZCX1-SW-04)~~
关键词
高电压技术
闪击距离
云地雷闪
数值模式
区域海拔高度
High-voltage technology
Altitude above the sea level
Cloud-to-ground lightning
The striking distance
