Experimental comparison between the effect of electrical discharge and the effect of surface heating on Mach 2 rarefied airflow over a flat plate

Experimental comparison between the effect of electrical discharge and the effect of surface... This study describes the experimental investigation of the effect of a negative DC glow discharge on a Mach 2 rarefied airflow around a flat plate. More precisely, we will show a comparison between two experiments. In the first one we will observe the effect of discharge by Pitot probe measurement. This discharge is created by applying negative DC potential difference between two electrodes flush mounted on the surface of a quartz flat plate placed in Mach 2 rarefied airflow. The electrodes are arranged in the spanwise direction. In the second experiment, electrodes are removed and replaced with a surface heater. The pressure profiles obtained by a glass Pitot tube are presented, and a comparison between the plasma effect and the surface heater effect is made, for the same surface temperature and in thermal equilibrium, with the aim of identifying the origin of the observed effect. For both experiments, surface heating causes a decrease in the boundary layer stagnation pressure, while increasing the boundary layer thickness, with the effects becoming larger for higher mean surface temperature. The effects due to the plasma actuator seem to be larger over the active electrode. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Experiments in Fluids Springer Journals

Experimental comparison between the effect of electrical discharge and the effect of surface heating on Mach 2 rarefied airflow over a flat plate

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Publisher
Springer-Verlag
Copyright
Copyright © 2012 by Springer-Verlag
Subject
Engineering; Engineering Thermodynamics, Heat and Mass Transfer; Engineering Fluid Dynamics; Fluid- and Aerodynamics
ISSN
0723-4864
eISSN
1432-1114
D.O.I.
10.1007/s00348-012-1319-z
Publisher site
See Article on Publisher Site

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