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 actuators when 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.
Published Version
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