Nanosecond Repetitively Pulsed Discharges have been proven to be efficient in flame stabilization. A two-step mechanism was proposed to explain the increased reactivity afforded by the discharge. This mechanism first creates excited electronic states of nitrogen, which then dissociate molecular oxygen through quenching reactions. In this paper, we investigated the temperature of the gas during and after the discharge using Optical Emission Spectroscopy on the second positive system of nitrogen, and simulated spectra from SPECAIR. The spatial profiles of excited nitrogen species densities in the discharge were determined using Abel-inverted spectra of the first and second positive system of nitrogen. The time evolution of the absolute density of N2(B) and N2(C) was also determined and the quenching rates of N2(B) and N2(C) by collisions with O2 were found to be 2.5 (±0.5)× 10-10 cm3.s-1 and 5.2 (±0.5)× 10-10 cm3.s -1 at 2000 K.
|Published - Dec 1 2012
|50th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition - Nashville, TN, United States
Duration: Jan 9 2012 → Jan 12 2012
|50th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition
|01/9/12 → 01/12/12
ASJC Scopus subject areas
- Aerospace Engineering