Relationship between Corona Discharge Thrust and Applied Voltage’s Polarity

The thrust from corona discharge might be a promising propulsion technology in future aviation due to its advantage of not requiring mechanical moving parts. Although the has been researched by many scholars, effect applied voltage’s polarity on received little attention. This very important for some special electrohydrodynamic thrusters. paper firstly built test platform reveal both and current pair symmetrically distributed needle electrodes. Then electrical field distribution between needle-plate electrodes was simulated. Finally, relationship space ions at tip electrode are discussed. results show that negative with smaller curvature radius stronger than positive one larger radius, corresponds higher current. local electric is enhanced electrode, while it weakened electrode. thrust.