The shock wave behavior generated from a single shot of pulsed nanosecond dielectric-barrier-discharge plasma actuator with varying pulse voltages in quiescent air was studied by experiments and numerical simulations. The experiments included using the schlieren technique, a fast response pressure transducer, and a two-velocity-component particle image velocimetry system to measure the propagation of the shock wave, the shock overpressure, and the shock induced flow, respectively. For the numerical simulation, a simple “phenomenological approach” was employed by modeling the plasma region over the encapsulated electrode as a jump-heated and pressurized gas layer. The present investigation revealed that the behaviors of the shock wave generated by the nanosecond pulsed plasma were fundamentally a microblast wave, and their speed and strength were found to increase with higher input voltages. The blast wave occured about 1 to 3 μ s after the discharge of the nanosecond pulse, which was dependent on the input voltages, and then it decayed quickly from a speed of around 400 m / s ( Mach = 1.14 ) to a speed of around 360 m / s ( Mach = 1.03 ) within about 5 μ s (2–3 mm from the actuator surface). The shock-induced burst perturbations (overpressure and induced velocity) were found to be restricted to a very narrow region (about 1 mm) behind the shock front and lasted only for a few microseconds. In a relatively long time period after the discharge of the plasma, a fairly weak induced vortex structure was observed. These results indicated that the pulsed nanosecond dielectric-barrier-discharge plasma actuator had stronger local effects in time and spatial domain.


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    Titel :

    Study of Shock and Induced Flow Dynamics by Nanosecond Dielectric-Barrier-Discharge Plasma Actuators


    Beteiligte:
    Zhao, Zijie (Autor:in) / Li, Jiun-Ming (Autor:in) / Zheng, Jianguo (Autor:in) / Cui, Y. D. (Autor:in) / Khoo, B. C. (Autor:in)

    Erschienen in:

    AIAA Journal ; 53 , 5 ; 1336-1348


    Erscheinungsdatum :

    2014-09-12


    Format / Umfang :

    13 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch