Summary

Development of non-axial streamer discharges in air between disc-electrodes is studied. Discharge inception and propagation between edges of two flat discs is treated with so-called drift-diffusion model accounting for transport, generation and losses of electrons and two generic types of ions (positive and negative) under the influence of the electric field. To simulate propagation of a streamer channel, generation of secondary electrons at the streamer head due to photoionization is included. Partial differential equations constituting the model are solved utilizing custom developed stabilized finite element procedure implemented in commercial software. The results of the performed simulations show that discharge inception takes place in the regions of enhanced electrostatic fields at the curved edges of both electrodes and two streamers propagate in air gap towards each other. Quantitative analysis of the dynamics of charge carriers' densities, generated space charges and magnitudes of the electric fields during streamer initiation and propagation is presented. The effect of space charges and their influence on the streamer propagation path is discussed.

Additional informations

Publication type ISH Collection
Reference ISH2015_101
Publication year
Publisher ISH
File size 654 KB
Price for non member Free
Price for member Free

Authors

Singh Shailendra, Serdyuk Yuriy, Summer Raimund

Streamer Propagation in Air in Non-Axially Symmetric Electric Field
Streamer Propagation in Air in Non-Axially Symmetric Electric Field