Untersuchung der Flamme des Methan-Luft-Gemisches mittels Doppelsondenmethode

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Abstract
Considering the delay of ion sheath formation, two different double probe methods, namely the saw tooth pulse method and the static probe potential method were applied to investigate the ionization of a propagating flame of a methane-air mixture. The measured results are in good agreement with one another, as long as the frequency of the applied saw tooth pulse is not too high. The electron temperature and the ion masses calculated from the probe characteristic suggest that there are mostly H-ions at all three points of maximum electron temperature in the flame and the activation energy of combustion in 36 to 45 Kcal/mol. The delay of ion sheath formation which is approximately calculated from the mobility of ions agrees with the measured one very well.

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