Mutual effects between a gliding arc discharge and a premixed flame  

作　　者：Jiajian ZHU Le LI Yifu TIAN Minggang WAN Mingbo SUN 朱家健;李乐;田轶夫;万明罡;孙明波(Hypersonic Technology Laboratory,National University of Defense Technology,Changsha 410073,People’s Republic of China)

机构地区：[1]Hypersonic Technology Laboratory,National University of Defense Technology,Changsha 410073,People’s Republic of China

出　　处：《Plasma Science and Technology》2024年第12期140-149,共10页等离子体科学和技术（英文版）

基　　金：financially supported by National Natural Science Foundation of China(Nos.12172379,12322211,and 11925207)。

摘　　要：Mutual effects between a gliding arc(GA)discharge at atmospheric pressure and a premixed CH_(4)/air flame were experimentally investigated.Effects of the flame on the GA were studied using simultaneous measurements of the current,the voltage,and the instantaneous images of the plasma columns.The GA in the flame has a thicker and more diffusive plasma column,and it is more frequently ignited at a smaller breakdown voltage than that in the air.The GA extension velocity and the gliding velocity in the flame are larger than those in the air.The electrode voltage drop of the GA discharge in the flame is about 160 V,whereas that in the air is about 220 V.Compared with the GA in the air,the different features of the GA in the flame can be explained by high-temperature,weakly ionized,and species-abundant environment that are generated by the premixed CH_(4)/air flame.Effects of the gliding arc discharge on the premixed flames were demonstrated using planar laser-induced fluorescence of hydroxyl radicals(OH)and formaldehyde(CH_(2)O).OH and CH_(2)O can be formed in the CH_(4)/air mixture in the presence of the GA due to kinetic effects,and the increase of OH and CH_(2)O shows the great potential of the GA for combustion enhancement.

关 键 词：gliding arc premixed flame discharge characteristics plasma-assisted combustion mutual effects planar laser-induced fluorescence(PLIF) 

分 类 号：O461[理学—电子物理学]