Barckmann, Katrin (2014)
Active Vortex Generation using Dielectric Barrier Discharge Plasma Actuators in Laminar Boundary Layers.
Technische Universität Darmstadt
Ph.D. Thesis, Primary publication
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Item Type: | Ph.D. Thesis | ||||
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Type of entry: | Primary publication | ||||
Title: | Active Vortex Generation using Dielectric Barrier Discharge Plasma Actuators in Laminar Boundary Layers | ||||
Language: | English | ||||
Referees: | Tropea, Prof. Cameron ; Choi, Prof. Kwing-So | ||||
Date: | 2014 | ||||
Place of Publication: | Darmstadt | ||||
Date of oral examination: | 18 December 2013 | ||||
Abstract: | The aim of this study is the characterization and quantification of dielectric barrier discharge plasma actuators when applied to the generation of stable vortices in laminar boundary layers for flow control. To this aim, existing measurement and analysis strategies were applied and extended. Using a specific actuator configuration the lower and upper operation limits have been identified. Between these limits, a constant and two-dimensional force distribution of the actuator can be expected. These operation limits were used to define the parameter range for the description of the induced body force in extent and magnitude. Alongside with this characterization the time resolved force production was analyzed. Based on these studies, the influencing parameters resulting from the actuator setup and the operating conditions were analyzed and quantified. Empirically determined scaling laws describing each influencing parameter were introduced. This enabled an improved prediction of the induced force for varying operating conditions. In addition to this direct scaling of the induced force by influencing the discharge, an indirect scaling method was presented by a non-continuous operation. This reduces the time-averaged force production and, therefore, allows decoupling of the force magnitude and its spatial extent. The analysis of the influencing parameters of the force production was used as a basis for parameter identification during the generation of longitudinal vortices by plasma actuator arrays. The qualification of plasma actuator vortex generators for transition control was demonstrated by the damping of Tollmien-Schlichting waves in laminar boundary layers in two different wind tunnels. |
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URN: | urn:nbn:de:tuda-tuprints-37650 | ||||
Classification DDC: | 600 Technology, medicine, applied sciences > 620 Engineering and machine engineering | ||||
Divisions: | 16 Department of Mechanical Engineering 16 Department of Mechanical Engineering > Fluid Mechanics and Aerodynamics (SLA) |
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Date Deposited: | 17 Oct 2014 10:36 | ||||
Last Modified: | 20 Jul 2016 12:51 | ||||
URI: | https://tuprints.ulb.tu-darmstadt.de/id/eprint/3765 | ||||
PPN: | 386820929 | ||||
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