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Empirical and Theoretical Correlations between Minimum Ignition Energy and Quenching Distance

Domenii publicaţii > Chimie + Tipuri publicaţii > Articol în volumul unei conferinţe

Autori: D. Oancea, D. Razus, V. Munteanu

Editorial: Proceedings of the 17th International Symposium on Combustion Processes, p.191-195, 2001.


The relationship correlating the minimum ignition energy and the quenching distance of different fuel-air mixtures is reanalyzed assuming that the first parameter is virtually equal to the reversible expansion work spent by the initial volume of unburnt gas to reach the critical volume of the minimal flame.
The form of the obtained equation, showing a first and a third power variation of minimum ignition energy with respect to initial pressure and quenching distance, respectively, is well supported by both the literature data and the results obtained for different propylene-air mixtures.
The quenching distances measured in small explosion vessels, when the pressure increases during the ignition period, are greater than those obtained in large vessels, in agreement with the behavior predicted by the model.

Cuvinte cheie: minimum ignition energy, quenching distance, propylene-air mixtures