Informace o publikaci

NUMERICAL SIMULATION OF ATMOSPHERIC PRESSURE TOWNSEND DISCHARGES IN NITROGEN WITH HYDROGEN GAS ADMIXTURES

Název česky Numerická simulace Townsendovského výboje za atmosférického tlaku v dusíku s příměsí vodíku
Autoři

JÁNSKÝ Jaroslav TRUNEC David NAVRÁTIL Zdeněk BRANDENBURG Ronny WAGNER Hans-Erich

Rok publikování 2008
Druh Článek ve sborníku
Konference Proccedings of HAKONE X
Fakulta / Pracoviště MU

Přírodovědecká fakulta

Citace
Obor Fyzika plazmatu a výboje v plynech
Klíčová slova electrical discharge; atmospheric pressure; nitrogen
Popis In this contribution the influence of hydrogen admixture on an Atmospheric Pressure Townsend Discharge (APTD) in nitrogen is investigated by means of numerical modelling and experiments. The numerical model is a one-dimensional fluid model. Electron emission from dielectrics by a diffusion flux of metastable molecules and photoemission are incorporated in the model. The secondary emission due to ions is neglected. The results are compared with measured electrical parameters (ignition voltage, voltage necessary for causing the transition to the filamentary regime and current evolution). The measured and simulated current profiles of discharge in nitrogen-hydrogen mixture are similar for applied voltages close to ignition voltage. The simulations give a qualitative explanation for the measured current profiles in pure nitrogen and for small admixtures of hydrogen. The results indicate that the influence of hydrogen on the APTD is due to the quenching of the main metastable state N2(A 3 Sigma+ u ) by hydrogen molecules and atoms. Generally a APTD typical one peak current structure is caused by secondary electron emission by nitrogen metastable molecules, a current pulse with multiple peaks is caused mainly by secondary emission of ions or photoemission.
Související projekty:

Používáte starou verzi internetového prohlížeče. Doporučujeme aktualizovat Váš prohlížeč na nejnovější verzi.

Další info