Detailed Information on Publication Record
2008
NUMERICAL SIMULATION OF ATMOSPHERIC PRESSURE TOWNSEND DISCHARGES IN NITROGEN WITH HYDROGEN GAS ADMIXTURES
JÁNSKÝ, Jaroslav, David TRUNEC, Zdeněk NAVRÁTIL, Ronny BRANDENBURG, Hans-Erich WAGNER et. al.Basic information
Original name
NUMERICAL SIMULATION OF ATMOSPHERIC PRESSURE TOWNSEND DISCHARGES IN NITROGEN WITH HYDROGEN GAS ADMIXTURES
Name in Czech
Numerická simulace Townsendovského výboje za atmosférického tlaku v dusíku s příměsí vodíku
Authors
JÁNSKÝ, Jaroslav (203 Czech Republic), David TRUNEC (203 Czech Republic, guarantor), Zdeněk NAVRÁTIL (203 Czech Republic), Ronny BRANDENBURG (276 Germany) and Hans-Erich WAGNER (276 Germany)
Edition
Francie, Proccedings of HAKONE X, p. 1-5, 5 pp. 2008
Publisher
University of Toulouse
Other information
Language
English
Type of outcome
Stať ve sborníku
Field of Study
10305 Fluids and plasma physics
Country of publisher
France
Confidentiality degree
není předmětem státního či obchodního tajemství
RIV identification code
RIV/00216224:14310/08:00025015
Organization unit
Faculty of Science
Keywords in English
electrical discharge; atmospheric pressure; nitrogen
Tags
International impact
Změněno: 10/11/2008 18:44, prof. RNDr. David Trunec, CSc.
V originále
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.
In Czech
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.
Links
| GA202/06/1473, research and development project |
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