S-Space College of Engineering/Engineering Practice School (공과대학/대학원) Dept. of Energy Systems Engineering (에너지시스템공학부) Nuclear Engineering (원자핵공학전공) Journal Papers (저널논문_원자핵공학과)
Experimental and Numerical Analysis of Streamers in Pulsed Corona and Dielectric Barrier Discharges
- Kim, Yongho; Kang, Woo Seok; Park, Jin Myung; Hong, Sang Hee; Song, Young-Hoon; Kim, Seok-Joon
- Issue Date
- IEEE Trans. Plasma Sci. vol. 32(1), pp. 18-24
- dielectric barrier discharge (DBD); nitrogen oxide (NO) decomposition; numerical modeling; optical emmision spectroscopy; pulsed corona discharge (PCD); streamer characteristics
- Streamer characteristics have been experimentally and numerically analyzed for pulsed corona discharge (PCD) and dielectric barrier discharge (DBD) to find out how the discharge methods determine them and how they, in turn, affect the generation of radicals in flue gases. Experiments have been performed and compared for decomposition of a nitrogen oxide (NO) using PCD and DBD, and the electric field and average electron energy in the streamer are measured in each discharge by using line ratio of N2+ to N2*. The measured results of electron energy reasonably explain in terms of G-value how the measured NO removal efficiencies have come out. The PCD having high electron energy turns out to be more efficient for generating N radicals, whereas the DBD containing relatively low electron energy is more effective for producing O radicals. 3-D and 1-D numerical simulations have been carried out to understand the observed streamer dynamics in both the PCD and DBD reactors. The 3-D numerical simulation has successfully illustrated the images of streamer front propagation in a wire-cylinder PCD reactor. In the 1-D simulation for the DBD, the recurrence phenomena of streamers have numerically appeared during the rising phase of an AC voltage. Furthermore, these numerical models have properly predicted the electric fields that are comparable with the corresponding average electron energies estimated from the emission spectral measurements for the PCD and DBD.
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