Modification of Airflow along a Flat Plate Using Positive and Negative DC Corona Discharge

摘要

This paper studies the effect of Positive and Negative DC Corona discharge on airflow over an inclined Flat plate made of insulating material. The discharge is caused by a wire of small radius and aluminum foil changing their role as anode and cathode. The electrodes are flush mounted such that the ionic wind is created adjacent to the plate and thereby control the Boundary layer. In this paper visualization of subsonic (0.5 m/s) airflow around the plate at different Voltages (ranging from 10 kV-32 kV) for positive and Negative corona are presented. Results show that at higher voltages the ionic wind created by both positive and negative corona is strong enough to considerably affect the viscous Boundary layer. Negative corona shows great potential to spoil the flow which perhaps can be used as spoilers or Airbrake.