EHD Simulation of Plasma Actuator Effect on Fluid Flow with Boundary Condition Modification in Suzen-Huang Model

Dielectric Barrier Discharge (DBD) plasma actuators are one of the most efficient and promising technique for active flow control. DBD plasma actuators are all-electric devices without need of pneumatic, hydraulic or moving parts. They are light and fast with low power consumption. All these features have attracted researchers to use these actuators in a variety of cases, such as turbulence flow control, laminar to turbulent transition suppression, separation control, drag reduction and mitigation of noise pollution. One of the models for simulation of plasma actuator effect on fluid flow is the electrostatic Suzen-Huang (S-H) model. This model adds the actuator effect as source terms to the Navier-Stikes equations by solving tow elliptic equations of the electrical potential and the charge density. In this study, a relationship between the independent electrical potential and charge density equations has been made in the form of a boundary condition for charge distribution on the dieleictic surface. The results show that the boundary layer structures on airfoil surface and flat plate is predicted with much higher accuracy by utilizing the modified model.