Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : March 17, 2018 - March 18, 2018
Experimental studies on vortex control using two dielectric barrier discharge plasma actuators (DBDPAs) were conducted. In this study, DBDPAs were used to restrict the vortex generated behind the normal flat plate at free stream velocity of 5 m/s. DBDPAs were attached to a back surface of the normal flat plate and a wall surface behind the flat plate. The experiment was carried out in a 200 mm × 200 mm circuit-type wind tunnel with 2000 mm working section. The flow velocity fields were measured by using a particle image velocimetry (PIV). DBD plasma was created using a high voltage power supply with frequency, fp = 4 kHz, and voltage Va = 4 kV, or with fp = 6 kHz, and 3 kV to investigate the discharge condition. It was found that the vortex with negative vorticity was suppressed behind the flat plate by the induced jet along the wall and the back surface of the flat plate when both of the DBDPAs were operated simultaneously. The performance of DBDPAs on vortex control was evaluated by mapping the changes in vortex area ratio against the power consumption. This result showed that the vortex area decreased with power consumption of DBDPAs and the magnitude of vortex area achieved minimum value when both of the DBDPAs were driven.
