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Linear Stability Analysis for Manipulated Boundary-Layer Flows using Plasma Actuators

Duchmann, A. and Reeh, Andreas and Quadros, Regis Sperotto de and Kriegseis, Jochen and Tropea, Cameron (2009):
Linear Stability Analysis for Manipulated Boundary-Layer Flows using Plasma Actuators.
In: IUTAM Symposium on Laminar-Turbulent Transition, Stockholm, June 23-26, [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. and Reeh, Andreas and Quadros, Regis Sperotto de and Kriegseis, Jochen and Tropea, Cameron
Title: Linear Stability Analysis for Manipulated Boundary-Layer Flows using Plasma Actuators
Language: English
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.

Title of Book: IUTAM Symposium on Laminar-Turbulent Transition, Stockholm, June 23-26
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
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