A plasma synthetic jet actuator (PSJA) with normal orifice was designed to study the effect of discharge resistor. The discharge characteristics and transient flow-field characteristics of actuator with 100

200

300 Ω were researched by electric parameter measurement system and high-speed schlieren technology. Results showed that the discharge process can be divided into two stages due to the existence of current limiting resistance

rapid discharge stage and slow discharge stage.This mode can continuously provide energy to the actuator while satisfying the higher initial energy injection

and effectively improve the stability of the actuator.At the same time

the smaller discharge resistance can obtain greater jet velocity

enhancing the jet flow control capability.The smaller discharge resistance led to the increase of discharge current

unstable velocity and worsening of working stability.In practical application

it was necessary to consider and determine the final resistance value comprehensively to ensure the rational distribution of energy in the two discharge stages.