2022 年 64 巻 209 号 p. 273-280
Dielectric barrier discharges can produce non-thermal plasma, which has been applied to ignition, plasma assisted combustion and fuel reforming. The authors have been investigating the ignition characteristics of radio-frequency dielectric barrier discharges at high pressure. In this paper, fundamentals of the dielectric barrier discharge and the energy measurement are explained approximately. After that, experimental results for ignition and combustion of the radio frequency barrier discharge are introduced with a plug electrode, focusing on the effects of pressure, the applied voltage, the alternate frequency, and the equivalence ratio. Detailed and time-resolved spectroscopies for dielectric barrier discharges are also shown under various conditions. From spectra of N2 second positive system, vibrational and rotational temperatures were calculated by fitting measured spectra to the theoretical spectra. Results indicated that local heating and discharge memory effects promote the ignition under an optimized condition. In addition, behaviors of the plasma and initial kernel formations with a pin-to-hemisphere electrodes for dielectric barrier discharge are explained. Optimizing the parameters improve ignition performance of the dielectric barrier discharge.
