Duchmann, A. ; Reeh, Andreas ; Quadros, Regis Sperotto de ; Kriegseis, Jochen ; Tropea, Cameron (2009)
Linear Stability Analysis for Manipulated Boundary-Layer Flows using Plasma Actuators.
Conference or Workshop Item
Abstract
This paper presents the implementation of a method for linear stability analysis (LSA) and its application to investigate transitional boundary-layer flows affected by dielectric-barrier discharge (DBD) actuators. These flow-control devices are used to influence the process of boundary-layer transition by electrohydrodynamic coupling of momentum to the surrounding fluid molecules. The boundarylayer profile and its stability characteristics are changed. Linear stability analysis is applied to numerical and experimental data and helps to understand the effective mechanisms of these flow-control actuatorswhen applied for transition control. Amplification rates in the linear growth stage are diminished and the critical as well as the local Reynolds number are affected by DBD actuation, leading to considerable delay of transition.
| Item Type: | Conference or Workshop Item |
|---|---|
| Erschienen: | 2009 |
| Creators: | Duchmann, A. ; Reeh, Andreas ; Quadros, Regis Sperotto de ; Kriegseis, Jochen ; Tropea, Cameron |
| Type of entry: | Bibliographie |
| Title: | Linear Stability Analysis for Manipulated Boundary-Layer Flows using Plasma Actuators |
| Language: | English |
| Date: | 2009 |
| Book Title: | IUTAM Symposium on Laminar-Turbulent Transition, Stockholm, June 23-26 |
| Abstract: | This paper presents the implementation of a method for linear stability analysis (LSA) and its application to investigate transitional boundary-layer flows affected by dielectric-barrier discharge (DBD) actuators. These flow-control devices are used to influence the process of boundary-layer transition by electrohydrodynamic coupling of momentum to the surrounding fluid molecules. The boundarylayer profile and its stability characteristics are changed. Linear stability analysis is applied to numerical and experimental data and helps to understand the effective mechanisms of these flow-control actuatorswhen applied for transition control. Amplification rates in the linear growth stage are diminished and the critical as well as the local Reynolds number are affected by DBD actuation, leading to considerable delay of transition. |
| Divisions: | 16 Department of Mechanical Engineering 16 Department of Mechanical Engineering > Fluid Mechanics and Aerodynamics (SLA) Zentrale Einrichtungen 16 Department of Mechanical Engineering > Fluid Mechanics and Aerodynamics (SLA) > Dynamics of drops and sprays |
| Date Deposited: | 21 Mar 2011 13:28 |
| Last Modified: | 03 Jun 2018 21:24 |
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