کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
724776 | 1461337 | 2007 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: The striking distance of lightning flashes and the early streamer emission (ESE) hypothesis The striking distance of lightning flashes and the early streamer emission (ESE) hypothesis](/preview/png/724776.png)
The attachment of a lightning flash to a lightning conductor (or to any other structure) takes place through a connecting leader that rises from the structure towards the descending stepped leader of a lightning flash. The spatial separation between the tip of the stepped leader and the lightning conductor (or the grounded structure) at the initiation of the connecting leader is known as the striking distance. In this paper the striking distance of stepped leaders is derived as a function of conductor height, conductor radii and the prospective return stroke current. Based on these results the validity of the early streamer emission (ESE) hypothesis is discussed. According to the ESE hypothesis, the striking distance of a lightning conductor can be increased by the artificial initiation of streamers from a lightning conductor. The results cast doubt on the validity of the ESE hypothesis. This in turn calls for more experimental data and field validations before using the ESE hypothesis in standard lightning protection practice.
Journal: Journal of Electrostatics - Volume 65, Issues 5–6, May 2007, Pages 336–341