Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : March 16, 2020 - March 17, 2020
Pages 16B08-
Around a normal flat plate of finite width in a uniform flow, a vortex with a structure peculiar to three-dimensional object is generated. The flow field around the flat plate can be improved by establishing fluid control methods. A DBD plasma actuator (DBDPA), which controls a flow by using the induced jet generated by dielectric barrier discharge, has attracted attention as one of the fluid control devices that can meet the above-mentioned needs. In this study, a DBDPA was attached to the wall surface in front of the flat plate and the effect of the induced jet on the vortex generated in front of the flat plate at free stream velocity of 3 m/s was experimentally investigated. The experiment was carried out in a circuit-type wind tunnel having a working section of 2000 mm in length and 200 mm × 200 mm in cross-sectional area. DBD plasma was produced using a high voltage power supply with amplitude 5 kV and frequency 4 kHz. As a result of measuring the velocity field around the flat plate using PIV, the vortex in front of the flat plate was restrained by the induced jet of the DBDPA. Moreover it was found that the DBDPA also affected the flow behind the flat plate.
