Abstract
This paper presents experimental measurements performed on a dielectric barrier discharge (DBD) plasma actuator with the electrodes in a serpentine design. Such a configuration induces a local pinching or local spreading of the fluid as one follows along the span of the actuator. In this work the serpentine configuration is constructed from patterned circular arcs. The influence of applied voltage on the induced flow field is studied. To quantify these effects, stereo particle image velocimetry (PIV) is used to generate time averaged, spatially resolved measurements of the detailed flow structure. The three components of the velocity vector are measured along both spanwise and streamwise cuts. These slices are then reconstructed to provide a 3D view of the induced flow field. The results for the induced flow fields are also compared with 2D PIV measurements made on a standard linear DBD actuator.
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