Print Email Facebook Twitter Energy deposition characteristics of nanosecond dielectric barrier discharge plasma actuators: Influence of dielectric material Title Energy deposition characteristics of nanosecond dielectric barrier discharge plasma actuators: Influence of dielectric material Author Correale, G. Winkel, R. Kotsonis, M. Faculty Aerospace Engineering Department Aerodynamics, Wind Energy & Propulsion Date 2015-08-24 Abstract An experimental study aimed at the characterization of energy deposition of nanosecond Dielectric Barrier Discharge (ns-DBD) plasma actuators was carried out. Special attention was given on the effect of the thickness and material used for dielectric barrier. The selected materials for this study were polyimide film (Kapton), polyamide based nylon (PA2200), and silicone rubber. Schlieren measurements were carried out in quiescent air conditions in order to observe density gradients induced by energy deposited. Size of heated area was used to qualify the energy deposition coupled with electrical power measurements performed using the back-current shunt technique. Additionally, light intensity measurements showed a different nature of discharge based upon the material used for barrier, for a fixed thickness and frequency of discharge. Finally, a characterisation study was performed for the three tested materials. Dielectric constant, volume resistivity, and thermal conductivity were measured. Strong trends between the control parameters and the energy deposited into the fluid during the discharge were observed. Results indicate that efficiency of energy deposition mechanism relative to the thickness of the barrier strongly depends upon the material used for the dielectric barrier itself. In general, a high dielectric strength and a low volumetric resistivity are preferred for a barrier, together with a high heat capacitance and a low thermal conductivity coefficient in order to maximize the efficiency of the thermal energy deposition induced by an ns-DBD plasma actuator. Subject dielectric barrier dischargedielectric materialsdielectric thin filmselectrodeselectrical resistivity To reference this document use: http://resolver.tudelft.nl/uuid:af74e635-2843-419e-bb35-dc2cfa5d971e ISSN 0021-8979 Source https://doi.org/10.1063/1.4929362 Source Journal of Applied Physics, 118 (8), 2015 Part of collection Institutional Repository Document type journal article Rights (c) 2015 AIP Files PDF Correale_2015.pdf 1.76 MB Close viewer /islandora/object/uuid:af74e635-2843-419e-bb35-dc2cfa5d971e/datastream/OBJ/view