Investigation on the Effect of Charge Injection from Non-Thermal Plasma on Soot Formation in Laminar Coflow Diffusion Flame

A novel, modified coflow burner was developed to study the effect of charge injection from a non-thermal plasma into three helium-diluted laminar diffusion ethylene flames. The frequency high voltage (HV) signal varied control ion concentration (charge) injected Optical emission spectroscopy used characterize while bias plate methodology gauge relative amount generated. For different HV frequencies, laser-induced fluorescence OH, chemiluminescence CH*, and incandescence soot in flames were measured. OH CH* measurements showed that retained classic flame shape with injection. Significant reduction observed at low corresponding an increase Notably, frequency, highly concentrated (60%) is times lower than less (32%) flame. This can be attributed decrease precursor ratio when increased. These results demonstrate current system promising candidate for studying on formation