THEPHYSICSANDPHENOMENOLOGYOFPARAELECTRICONEATMOSPHERE.pdf

AIAA PAPER 2005 - 0781 THE PHYSICS AND PHENOMENOLOGY OF PARAELECTRIC ONE ATMOSPHERE UNIFORM GLOW DISCHARGE PLASMA (OAUGDP?) ACTUATORS FOR AERODYNAMIC FLOW CONTROL* J. Reece Roth and Xin Dai Plasma Sciences Laboratory () Department of Electrical and Computer Engineering University of Tennessee, Knoxville, TN 37996-2100 and Jozef Rahel and Daniel M. Sherman Atmospheric Glow Technologies, Inc. () Knoxville, TN 37932-3723 Presented at the AIAA 43nd Aerospace Sciences Meeting and Exhibit Reno Hilton Hotel, Reno, Nevada January 10-13, 2005 ?This work was supported in part by Air Force SBIR Phase I Contract FA8651-04-C-0225, Dr. Kenneth W. Burgi, Program Manager, by the University of Tennessee, and by Atmospheric Glow Technologies, Inc. The authors would like to express their appreciation to Stephen P. Wilkinson, NASA Langley Research Center, for making available a Pitot tube system. ABSTRACT In this paper, we present data on the physics and phenomenology of plasma actuators based on the One Atmosphere Uniform Glow Discharge Plasma (OAUGDP?) that may be useful in optimizing the paraelectrically induced flow velocity. It is shown that the real (as opposed to reactive) power delivered to an actuator is divided between dielectric heating of the insulating panel, and power delivered to the plasma that is available for flow acceleration. The correspondence between the power input to the plasma and the flow velocity is presented, along with a discussion of selecting the RF voltage, frequency, electrode gap distance, and dielectric material that optimizes the induced flow velocity of a single actuator for a given power input to the plasma. Induced flow velocities in air of 5+ m/sec from a single Teflon dielectric plasma actuator, and 10+ m/sec from a series array of 8 such electrodes wil l be reported. PLASMA ACTUATORS ? Plasma actuators use Electrohydrodynamic (EHD) or Magnetohydrodynamic (MHD) forces to accelerate boundary layer flows by adding momen