ABSTRACT
In the present study DBD plasma actuator was applied into a 2D incompressible channel flow to study turbulent structures by using a Finite Difference approach to k-ε turbulent model and also Realizable k-ε model. The actuator was simulated by Modified Lumped Circuit Element Electro- Static model just as the previous work in (2016) [1]. The study was continued by Reynolds number of 5600 with constant inlet velocity profile. The length of the channel flow was considered to be long enough for reaching a fully- developed flow region. The results showed that Lorentz body force of the plasma actuator could reduce the fluctuation terms of velocity in general but since k-ε model is almost invalid near the walls especially where the strong velocity gradients by the actuator are dominant, a significant discrepancy was observed between the two turbulent models. Moreover a hypothesis about the skin friction reduction by the DBD plasma jet actuator was discussed in this work. The features of the DBD plasma actuator were selected to be 2KV for the peak voltage amplitude, 10000 Hz for the voltage frequency and kapton as the dielectric in which the actuator can be considered as an almost weak Synthetic Jet Plasma generator.
