Electron Temperature Measurement in a Premixed Flat Flame Using the Double Probe Method

0385233 - ÚFCH JH 2013 RIV DE eng J - Journal Article
Wild, J. - Kudrna, P. - Tichý, M. - Nevrlý, V. - Střižík, M. - Bitala, P. - Filipi, B. - Zelinger, Zdeněk
Electron Temperature Measurement in a Premixed Flat Flame Using the Double Probe Method.
Contributions to Plasma Physics. Roč. 52, č. 8 (2012), s. 692-698. ISSN 0863-1042. E-ISSN 1521-3986
R&D Projects: GA ČR(CZ) GAP108/11/1312; GA MŠMT LD12020
Institutional support: RVO:61388955
Keywords : double probe method * electron temperature * atmospheric premixed flame
Subject RIV: CF - Physical ; Theoretical Chemistry
Impact factor: 0.934, year: 2012

The electron temperatures T-e were measured using a double probe in a premixed methane flame produced by a calibration burner according to Hartung et al. The experiment was performed at atmospheric pressure. In contrast to other authors, we have managed to find typical nonlinearities corresponding to the retarding electron current region and to calculate electron temperatures using a suitable fit on the basis of the measured characteristics. A Pt-Rh thermocouple was used to measure temperatures T-h corresponding to "heavy" species. Our results indicate that the flame plasma can be considered to be weakly non-isothermic - T-e = (2400-4000) K, T-h = (1400 - 1600) K. On the basis of measurement of the saturated ion current, the number density of the charged particles was estimated at (0.3 - 3.8).10(17) m(-3). The trends in T-e and T-h in dependence on the positions of the probes and thermocouple in the flame differ substantially; this fact has not yet been explained.
Permanent Link: http://hdl.handle.net/11104/0214561