Efiect of Air∞ows on Repetitive Nanosecond Volume Discharges ⁄

Atmospheric pressure discharges excited by repetitive nanosecond pulses have at- tracted signiflcant attention for various applications. In this paper, a plate-plate discharge with air∞ows is excited by a repetitive nanosecond pulse generator. Under difierent experiment con- ditions, the applied voltages, discharge currents, and discharge images are recorded. The plasma images presented here indicate that the volume discharge modes vary with air∞ow speeds, and a difiuse and homogeneous volume discharge occurs at the speed of more than 35 m/s. The role of air∞ows provides difierent efiects on the 2-stage pulse discharges. The 1st pulse currents nearly maintain consistency for difierent air∞ow speeds. However, the 2nd pulse current has a change trend of flrst decreasing and then rapidly increasing, and the value difierence for 2nd pulse cur- rents is about 20 A under difierent air∞ows. In addition, the experimental results are discussed according to the electrical parameters and discharge images.