Glidingarc discharges can produce periodic non-equilibrium low-temperature plasma at atmospheric pressure.However

the periodicity of the gliding arcsin pulsed discharge is affected by the discharge parameters and the gas flow.In this paper

the microsecond pulse power supply is used to excite the gliding arc dischargewith knife electrodes. The periodic characteristics of the pulse gliding arc are experimentally studied by changing the gas flow rate and the pulse repetition frequency（PRF）. The results show that with the increase of gas flow

the average velocity of the gliding arcs gradually increases. When the flow rateis less than 4.6 m/s

the airflow is in laminar state and the gliding arc exhibits a periodic mode. The maximum height of the gliding arc increases when the flow rate increases. When the flow rate is5.0～8.0 m/s

the air current is in the state of transition from laminar to turbulent flow and the gliding arc discharge transitions from periodic to non-periodic mode and the corresponding maximum height of the gliding arc is reduced. When the flow rate is fixed at 5.0 m/s

the gliding period gradually changes from the non-periodic discharge to the periodic discharge when the PRF increases

and the maximum height of the gliding arcs also increases. Therefore

a stable airflow field and high PRF are beneficial to the periodic development of the gliding arcs.