• A
  • A
  • A
  • ABC
  • ABC
  • ABC
  • А
  • А
  • А
  • А
  • А
Regular version of the site

Article

A Study of Parameters of the Counterpropagating Leader and its Influence on The Lightning Protection of Objects Using Large-Scale Laboratory Modeling

Radiophysics and Quantum Electronics. 2014. Vol. 56. No. 11-12. P. 839-845.
Syssoev V. S., Kostinskiy A., Makal’sky L. M., Rakov V., Andreev M. G., Bulatov M., Sukharevsky D., Naumova M.
In this work, the results of experiments on initiating the upward and descending leaders during the development of a long spark when studying lightning protection of objects with the help of large-scale models are shown. The influence of the counterpropagating leaders on the process of the lightning strike of ground-based and insulated objects is discussed. In the first case, the upward negative leader is initiated by the positive downward leader, which propagates from the high-voltage electrode of the “rod–rod”-type Marx generator (the rod is located on the plane and is 3-m high) in the gap with a length of 9–12 m. The positive-voltage pulse with a duration of 7500 μs had an amplitude of up to 3 MV. In the second case, initiation of the positive upward leader was performed in the electric field created by a cloud of negatively charged aerosol, which simulates the charged thunderstorm cell. In this case, all the phases characteristic of the ascending lightnings initiated by the tall ground-based objects and the triggered lightnings during the experiments with an actual thunderstorm cloud were observed in the forming spark discharge with a length of 1.5– 2.0 m. The main parameters of the counterpropagating leader, which is initiated by the objects during the large-scale model experiments with a long spark, are shown.