Electrohydrodynamic Flow Control with a Glow-Discharge Surface Plasma

Abstract

Multiplee ow diagnostics have been applied to planarpanels covered by strips of glow-discharge surface plasma in atmospheric pressure air generated by the one atmosphere uniform glow discharge plasma. Direct drag measurements, smoke wire and titanium tetrachloride e ow visualization, and boundary-layer velocity proe les were obtained. The plasma generated along streamwise-oriented, symmetric strip electrodes is shown to cause a large increase in drag, whereas the plasma along spanwise-oriented, asymmetric strip electrodes can generate a signie cant thrust. Flow visualization and mean velocity measurements show the primary cause of the phenomena to be a combination of mass transport and vortical structures induced by strong electrohydrodynamic body forces on the e ow, known as paraelectric forcing.