Electron Temperature Measurement in a Premixed Flat Flame Using the Double Probe Method |
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| Authors: | J. Wild P. Kudrna M. Tichý V. Nevrlý M. Střižík P. Bitala B. Filipi Z. Zelinger |
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| Affiliation: | 1. Charles University in Prague, Faculty of Mathematics and Physics, V Hole?ovi?kách 2, 180 00 Praha 8, Czech Republic;2. V?B ‐ Technical University of Ostrava, Faculty of Safety Engineering, Lumírova 13, 700 30 Ostrava‐Vy?kovice, Czech Republic;3. J. Heyrovsky Institute of Physical Chemistry, v.v.i., Academy of Sciences of the Czech Republic, Dolej?kova 3, 182 23 Praha 8, Czech Republic |
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| Abstract: | The electron temperatures Te 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 Th corresponding to “heavy” species. Our results indicate that the flame plasma can be considered to be weakly non‐isothermic — Te = (2400–4000) K, Th = (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) · 1017 m‐3. The trends in Te and Th in dependence on the positions of the probes and thermocouple in the flame differ substantially; this fact has not yet been explained (© 2012 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim) |
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| Keywords: | Double probe method electron temperature atmospheric premixed flame flat flame |
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