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

Joule heating flow control methods for high-speed flows

“…25 The study confirms the effects of dielectric thickness and actuator length on energy per pulse and thus on pressure wave strength shown by Aba'a Ndong et al 25 Dawson et al 24 also confirm the conclusion from Zhao et al 26 that increasing voltage increases the pressure wave strength. The qualitative nature of using image intensity to determine pressure wave strength is noted by the author.…”

“…Above this pressure the discharge is streamer in nature. Shibkov et al 126 agree, qualitatively, with the relation given in Eq (26). At low pressures they found that the discharge took the form of a chain of closely spaced plasma filaments i.e.…”

“…Zhao et al 26 recently studied the shock generated by ns-DBD actuators both experimentally and computationally. They assume that the plasma region is "jump-heated", i.e.…”

“…The values calculated are then used as initial conditions for the 2D compressible Navier-Stokes equations solver used. Equations 2-4 are the three equations used by Zhao et al 26 to calculate these initial conditions (subscript 1, 2 and s refer to ambient, post-heating and post shock properties):…”

Temporal variation of the spatial density distribution above a nanosecond pulsed dielectric barrier discharge plasma actuator in quiescent air

“…The energy transfer generated by ns-DBD plasma actuators results in dominant flow control authority. Induced flow characteristics in a quiescent gas condition were numerically and experimentally investigated in the previous studies [18][19][20]. Zhao et al [20] investigated a shock Mach number in various input voltages and showed that the shock Mach number which depends on the input voltages decays quickly and it propagates at approximately Mach 1 from 2 or 3 mm from the plasma surface.…”