SMuK 2023 – scientific programme

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P: Fachverband Plasmaphysik

P 5: Atmospheric Pressure Plasmas and their Applications I

P 5.7: Talk

Tuesday, March 21, 2023, 12:45–13:00, CHE/0089

Control of the gas flow by a surface barrier discharge — •Soad Mohsenimehr, Marc Böke, and Achim Von Keudell — Experimental Physics II, Ruhr-University Bochum, Bochum, Germany

Surface Dielectric Barrier Discharges (SDBD) are well-known plasma sources for gas stream purification and gas conversion due to their easy scalability in various applications. In addition, SDBDs are used as plasma actuators to generate thrust in a gas for flow control. The aim of this project is to combine plasma chemistry and plasma-based flow control concepts. The plasma-flow interaction and its contribution to the chemistry of transported species is evaluated. In this work, a twin SDBD is employed, which consists of an aluminium oxide plate (190x88x0.63 mm) that is covered by nickel metallic grid printed on both sides. The SDBD is generated at atmospheric pressure using damped sinusoidal voltage waveforms (G2000 Redline Technologies). To investigate the flow pattern, the Schlieren technique was carried out to visualize the refractive index gradients in the medium and to compare this with a fluid dynamic simulation in two dimensions performed by COMSOL. The fluid simulation uses the 2D Navier Stokes equations for compressible Laminar flow assuming small Reynolds numbers. This simulation model is used to predict the plasma aerodynamic and how it could influence the surrounding fluidic flow. The formation of distinct vortices in the flow pattern in both simulation and experiment is observed. The electrode design of the SDBDs is optimized to maximize the plasma-induced thrust on the species conversion.