Numerical Study of Dielectric Barrier Discharge (DBD) Plasma Actuators on Separation Control of Supersonic Flow

The aim of present study is to control the supersonic flow (M=1.5) over a compression ramp using Dielectric Barrier Discharge (DBD) plasma actuators. For numerical simulation, 2D and 3D Nervier-Stokes equations along with the kω SST turbulence model and Jameson's method are used. DBD Actuator is simulated in steady mode using Shyy phenomenological model and then applied to the momentum equations as a source term. The numerical results with the presence of two rows of DBD in voltage of 75 kV and frequency of 2 kHz discharging at starting point of separation reduced the separation region by 10 mm, moved shock location and increased its angle by 2°. Parametric study of DBDs are illustrated that the most efficient location of actuator is related to time when actuator is exactly located at the start point of separation. Also, increasing frequency and voltage of DBD reduced the separation and formation of vortices as well as the displacement of shock wave. Finally, increasing the number of DBD to three rows, with the frequency and voltage up to 10 kHz and 75 kV respectively, completely eliminate the vortices of separation region.