Theoretical analysis of the dielectric characteristics of plasma flame and imaging plasma flame using Electrical Capacitance Tomography

Based on the detailed analysis of the plasma flame ionization phenomena, polarization mode, displacement polarization mechanism of bound electrons and free electros, the dielectric coefficient theoretical model of plasma flame was proposed in this paper. The coupled effects of the movements of charged particles and electromagnetic wave were considered, and the dielectric coefficient expression of plasma flame was derived. Meanwhile, combined mathematical models of ECT (Electrical Capacitance Tomography) sensors and multi-point calibration measurement data, distributions information of plasma flame dielectric coefficient in the measured region was obtained and further compared with the theoretical results. The methodology and results of this study provided novel method and valuable data for the investigation of plasma combustion using ECT.