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Experiments in Fluids

Erschienen in:

01.12.2010 | Research Article

Transient growth instability cancelation by a plasma actuator array

verfasst von: Ronald E. Hanson, Philippe Lavoie, Ahmed M. Naguib, Jonathan F. Morrison

Erschienen in: Experiments in Fluids | Ausgabe 6/2010

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Abstract

This study investigates an actuation scheme that can be integrated as part of a feedback control system in the laboratory for the purpose of negating the transient growth instability in a Blasius boundary layer and delaying transition. The actuators investigated here consist of a spanwise array of symmetric plasma actuators, which are capable of generating spanwise-periodic counter-rotating vortices. Three different actuator geometries are investigated, resulting in 45, 67 and 70% reduction of the total disturbance energy produced inside the boundary layer by an array of roughness elements. It is demonstrated that the control effectiveness of the actuators can be significantly improved by optimizing the geometry of the array.

Vorheriger Artikel Experiments on turbulence beneath a free surface in a stationary field generated by a Crump weir: free-surface characteristics and the relevant scales

Nächster Artikel Active thermal management of on-chip hot spots using EWOD-driven droplet microfluidics

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Titel: Transient growth instability cancelation by a plasma actuator array
verfasst von: Ronald E. Hanson
Philippe Lavoie
Ahmed M. Naguib
Jonathan F. Morrison
Publikationsdatum: 01.12.2010
Verlag: Springer-Verlag
Erschienen in: Experiments in Fluids / Ausgabe 6/2010
Print ISSN: 0723-4864
Elektronische ISSN: 1432-1114
DOI: https://doi.org/10.1007/s00348-010-0877-1

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