电瓷避雷器Issue(6)：11-19,9.DOI:10.16188/j.isa.1003-8337.2024.06.002
空中触发闪电的双向先导与回击过程特征研究
Characteristics of Bi-Direction Leader and the Return Stroke Process of Altitude Triggered Lightning Flash
摘要
Abstract
The discharge process of altitude-triggered lightning flash had been studied in detail by using observation from high-speed digital camera(1 000 s-1),slow antenna and fast antenna located in 60 m and 550 m.The analyzed results suggested that the downward negative leader had several intermis-sions,and the average step interval was 17.8 µs.The upward positive leader also had step characteris-tics,and the average step interval was 18.7 µs.During the developing period of downward negative lead-er,the upward positive leader was born the step.While the negative leader stopped,the positive leader translated into continuous development.The upward positive leader was produced earlier about 1 ms than the downward negative leader.Just at the connecting time,the luminescence of the channel had disconti-nuity.The average velocity of the step leader before the first return stroke was(1～4.6)× 104 m/s.The average velocity of the dart leader was(1.5～6.2)× 106 m/s.The first stroke was companied by long continue current and active initial M component.关键词
人工触发闪电/双向先导/回击/高速摄像Key words
altitude triggered lightning flashes/bi-direction leader/return stroke/high speed video camera引用本文复制引用
孔祥贞,徐康,赵阳..空中触发闪电的双向先导与回击过程特征研究[J].电瓷避雷器,2024,(6):11-19,9.基金项目
国家重点研究发展计划项目(编号:2017YFC1501504) （编号:2017YFC1501504）
国家自然科学基金项目(编号:41875002,41975003).Project supported by National Program on Key Research Project of China(No.2017 YFC1501504) （编号:41875002,41975003）
National Natural Science Founda-tion of China(No.41875002,41975003). （No.41875002,41975003）
