Numerical and Experimental Analysis of Nanosecond Pulse Dielectric Barrier Discharge-Induced Nonthermal Plasma for Pollution Control

Numerical and experimental analyses are conducted on a nanosecond pulse dielectric barrier discharge-induced nonthermal plasma (NTP) for pollution control. In the numerical analysis, a commercial simulation software, CFD-ACE + solver, is used. The result indicates that a streamer progressing from the positive electrode to the grounded one is well simulated. At the end of the pulse, the electron temperature and electron number density in the coaxial-type plasma reactor finally reach approximately 1.7 eV and 10¹⁵ m^-3, respectively. The radial electric field is almost constant in the plasma region. During the single pulse, the peak concentration of ozone is approximately 40 ppm near the surface of the glass barrier. Next, an experimental analysis on the optical emission spectra of the NTP is carried out. In the result, the second positive bands spectra of N₂ are observed. The evaluated electron temperature is almost constant (approximately 1.8 eV), irrespective of frequency, discharge power, and radial position. This value and tendency agree well with the numerical results.