中文摘要：

为实现等离子体和催化材料的紧密结合，构建了电晕放电极、辅助电极、催化材料和接地极组成的反电晕放电体系。采用伏安特性、图像分析、发射光谱和粒子成像测速技术研究反电晕放电过程和等离子体特性。结果表明：基于直流电晕放电，在颗粒层或蜂窝表面和孔道中发生二次放电，产生了反电晕等离子体；发生反电晕时，电流显著增大，在相同电压条件下，反电晕电流是典型的电晕放电电流的2倍以上；反电晕放电区域主要是N2的第二正系激发态物质，波长为337．13nm和357．69nm的发射光谱强度较大；反电晕改变了放电区域的流场，产生的离子风速度超过1．0m／s；辅助网电极限制了蜂窝表面和孔道的流光向火花放电发展，实现稳定的反电晕放电。

英文摘要：

For the realization of a well combination of plasma and catalyst, a back corona discharge （BCD） system was built with discharge electrode, auxiliary electrode, catalyst and grounded electrode. The process of back corona discharge and the characteristics of plasma generated were studied by using voltage-current curve, imaging analysis, spectrum analysis, and particle image velocimetry （PIV）. The experimental results show that, based on the DC corona discharge, back corona plasma can be generated by the secondary discharge in the particle layer or in the surface layer and channel of honeycomb. The discharge current increases significantly as the BCD occurs, and the current is more than twice that of a typical corona discharge at the same applied voltage. The second positive system of N2 is the mainly active species in BCD zone, and the strong emission lines with wavelength of 337.13 nm and 357.69 can be observed. The flow field distribution will be completely changed and the ions wind with the velocity more than 1.0 m/s is generated when BCD occurs. The propagation of streamer to spark will be reduced by using the auxiliary electrode, so that the stable BCD is realized.