Dielectric barrier discharges in airflow around a circular cylinder

The influence of airflow on the dielectric barrier discharge is a widely investigated topic for its extensive applications. In this paper, the discharge pattern and motion law of discharge spots under Karman's vortex street on atmospheric pressure are experimentally investigated by constructing the airflow around a circular cylinder. It is found that the discharge filament composed of the movement trajectory of the discharge spots has a good corresponding relationship with the streamline. When the Reynolds number is increased, the flow field at the rear of the cylinder changes from laminar to vortex. The discharge patterns at an appropriate exposure time reflect the topological structure of the wake flow, which changed with the Reynolds number. Published under an exclusive license by AIP Publishing.