As a new method to cure acute respiratory distress syndrome (ARDS),high bloodpressure and some illnesses related to the lung,NO has recently received more attention.Thermalplasmas produced by arc discharge can create medical NO,but the concentration of NO2 producedby arc discharge must be controlled simultaneously.This paper investigates the characteristicsand regulations of NO production at different flow distribution by pulsed arc discharge in dryair with a special pulsed power.The experimental results show that the flow distribution hasa considerable effect on the NO concentration,the stabilization of NO.The production of NO_2could be controlled and the ratio of NO_2/NO was decreased to about 10% in the arc discharge.Therefore,the arc discharge could produce stable inhaled NO for medical treatment by changingthe flow distribution.
