%0 Thesis %A Devarajan, Aarthi %D 2019 %T Development of plasma actuators for high-speed flow control based on nanosecond repetitively pulsed dielectric barrier discharges %U https://hammer.purdue.edu/articles/thesis/Development_of_plasma_actuators_for_high-speed_flow_control_based_on_nanosecond_repetitively_pulsed_dielectric_barrier_discharges/7762148 %R 10.25394/PGS.7762148.v1 %2 https://hammer.purdue.edu/ndownloader/files/14454230 %K NRP-DBD actuators %K Electrode geometries %K Aerospace Engineering %X Over the past few decades, surface dielectric barrier discharge (SDBD) actuators have been studied extensively as aerodynamic flow control devices. There has been extensive research on producing SDBD plasmas through excitation by sinusoidal high voltage in low-speed flows, resulting in local acceleration of the flow through the electrohydrodynamic (EHD) effect. However, high-speed flow control using SDBD actuators has not been considered to the same extent. Control through thermal perturbations appears more promising than using EHD effects. SDBDs driven by nanosecond repetitively pulsed (NRP) discharges (NRP SDBDs) can produce rapid localized heating and have been used to produce better flow reattachment in high-speed flows. While surface actuators based on NRP DBDs appear promising for high-speed flow control, the physics underlying the plasma/flow coupling are not well understood and the actuators have yet to be fully characterized or optimized. In particular, methods for tailoring the plasma characteristics by varying the actuator’s electrical or geometrical characteristics have not been thoroughly explored.