Measurement of the Degree of Mixing of Carbon-Containing Gases with Air by the Method of Probe Discharge Spectroscopy

A method based on spectral analysis of the radiation of a low-power high-voltage electric discharge is proposed for the estimation of the degree of mixing of hydrocarbon fuels with air and nitrogen. The transition bands N-2((CPu)-P-3 -> (BPg)-P-3, 0-2) and CN (B-2 sigma(+) -> X-2 sigma(+), 0-0) were selected for analysis. A series of calibration measurements was carried out for several model mixtures. The range of applicability of the method with respect to the concentration of carbon-containing gas is determined. The proposed approach is used to assess the effectiveness of the intensification of the mixing a jet of gaseous fuel with air by a powerful pulsed discharge.