Time-resolved and time-averaged net force (electrohydrodynamic force plus viscous drag) are presented for a dielectric-barrier-discharge-based aerodynamic plasma actuator operated in artificial atmospheres composed of nitrogen ( N 2 ) with various concentrations of electronegative gasses: 1–20% oxygen ( O 2 ) and 0.01–0.34% sulfur hexafluoride ( SF 6 ). It is possible to deconvolve and isolate the role of oxygen to the negative-going or forward stroke of the discharge and to the region of parameter space with high E / n : a change in oxygen content by a factor of 20 yields only a 20% increase in force produced when 12 kV AC is applied to the system but yields a 170% increase when the voltage amplitude is increased by less than a factor of 2, to 20 kV applied. It is shown that substituting SF 6 for O 2 produces a mild net increase in force production that saturates at very low SF 6 concentrations (0.1%) and that the increase is limited because of substantial (50%) losses of the momentum to drag even though the momentum input is increased by a factor of 2.


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    Title :

    Normalized Electronegative Species Effects in the Dielectric-Barrier-Discharge Plasma Actuator


    Contributors:
    Enloe, C. L. (author) / Mangina, R. S. (author) / Font, G. I. (author)

    Published in:

    AIAA Journal ; 54 , 7 ; 2061-2068


    Publication date :

    2016-05-20


    Size :

    8 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English





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