Abstract：The one dimensional selfconsistent model of nitrogen dielectric barrier discharge at atmospheric pressure was established to numerically simulate the spatiotemporal characteristics of nitrogen in discharge gap. The simulation results show that there are two times discharge in one discharge cycle, and the discharge begins when first peak of current density appears before applied voltage reversing. The gas gap voltage remains constant till applied voltage reverses to the maximum peak value, and then discharge ends. The number densities of N2(A3∑+u) and N2(a′1∑-u) with long life are significantly higher than those of N2(B3Πg) and N2(C3Πu). The number densities of N2(B3Πg) and N2(C3Πu) are greatly influenced by electric field distribution in discharge space, and the peak value appears alternately between positive and negative conversion during discharge process. The number densities of nitrogen ion state of particles are higher than that of electron density，which illuminates the nitrogen DBD belongs to Townsend discharge， and N+2 are main nitrogen ion state particles in discharge space.
2014, Vol. 35 
