Abstract
We suggest an explanation for the disagreement between the theoretically calculated and experimentally measured data concerning the electric current detected in diagnostic devices (like electric probes or flame ionization detectors, FID) used for investigation of the ionization processes in high-temperature mixtures of molecular gases at normal pressure. The conclusions are in good agreement with experimental data under the condition that the strong electric field produced by the electrodes of the diagnostic devices induces additional ionization of electronically excited molecules, which are always present in combustion products. ► Disagreement between theory and experiment in electric probe measurements is explained. ► New model of ionization processes under strong electric field in gases is suggested. ► Additional ionization of near-probe layer results in significant increase in current on probe. ► Agreement of experiment with theory taking into account additional ionization is received.
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