Active Flow Control on a Circular Cylinder via Streamwise-oriented Dielectric Barrier Discharge Plasma Actuators

2013 ◽  
Author(s):  
Jee Hann Ng ◽  
Jiun-Ming Li ◽  
Yongdong Cui ◽  
T.t. Lim
Keyword(s):  
Circular Cylinder ◽  
Dielectric Barrier Discharge ◽  
Discharge Plasma ◽  
Barrier Discharge ◽  
Active Flow Control ◽  
Plasma Actuators ◽  
Dielectric Barrier Discharge Plasma ◽  
Dielectric Barrier ◽  
Barrier Discharge Plasma ◽  
Active Flow

Analysis and Implementation of Dielectric Barrier Discharge Plasma Actuators for Ground Vehicles Wake Reduction

2021 ◽  
Author(s):  
F. F. Rodrigues ◽  
M. Moreira ◽  
J. Pascoa
Keyword(s):  
Dielectric Barrier Discharge ◽  
Discharge Plasma ◽  
Barrier Discharge ◽  
Active Flow Control ◽  
Plasma Actuators ◽  
Ground Vehicles ◽  
Dielectric Barrier Discharge Plasma ◽  
Dielectric Barrier ◽  
Barrier Discharge Plasma ◽  
Active Flow

Abstract Plasma actuators are promising devices with several possible applications in active flow control field. One of the possible applications of these devices is wake reduction in ground vehicles. By delaying the flow separation and reducing the wake of the flow, these devices allow to reduce the drag which, in turns, leads to important savings in terms of fuel consumption. In the current work, the operation of dielectric barrier discharge plasma actuators is studied considering their application for active flow control in ground vehicles. A plasma actuator was fabricated and experimentally characterized in terms of electrical and mechanical features. A ground vehicle model, with different rear slant angles, was constructed and preliminary tests were performed in a wind tunnel. The dielectric barrier discharge plasma actuator was implemented on the top rear part of the model, in the first separation zone of the flow, in order to attach the flow to the surface and reduce the wake flow. The experimental tests were performed for rear slant angles of 30°, 45° and 60°. The different vehicle models were tested for a flow velocity of 5m/s. Flow visualization and velocity measurements were performed in order to analyze the flow behavior and the active flow control effect obtained by the plasma actuation. It is shown that by using plasma actuators on the rear of the model, the plasma actuation pulls the flow toward the surface and reduce the wake of the flow.

Impact of dielectric barrier discharge plasma on the wake of a wind turbine blade section oscillating in plunge

2021 ◽  
pp. 095765092110337
Author(s):  
GH Maleki ◽  
Ali R Davari ◽  
MR Soltani
Keyword(s):  
Wind Turbine ◽  
Dielectric Barrier Discharge ◽  
Turbine Blade ◽  
Discharge Plasma ◽  
Barrier Discharge ◽  
Wind Turbine Blade ◽  
Plasma Actuators ◽  
Dielectric Barrier Discharge Plasma ◽  
Dielectric Barrier ◽  
Barrier Discharge Plasma

Effects of dielectric barrier discharge plasma have been studied on the wake velocity profiles of a section of a 660 kW wind turbine blade in plunging motion in a wind tunnel. The corresponding unsteady velocity profiles show remarkable improvement when the plasma actuators were operating and the angles of attack of the model were beyond the static stall angles of the airfoil. As a result the drag force was considerably reduced. It is further observed that the plasma-induced flow attenuates the leading edge vortices that are periodically shed into wake and diminishes the large eddies downstream. The favorable effects of the plasma augmentation are shown to occur near the uppermost and lowermost positions of the plunging paths where the wake is primarily dominated by the vortices of the same sign. The wake structure in the presence of the flow induced by the plasma actuators shows that the actual effective angles of attack seen by the plunging airfoil reduces in comparison with that for the case of the plasma augmentation off situation.

Sign in / Sign up

Export Citation Format

Share Document