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Erschienen in:

2014 | OriginalPaper | Buchkapitel

Controlling the Large-Scale Motions in a Turbulent Boundary Layer

verfasst von : I. Marusic, K. M. Talluru, N. Hutchins

Erschienen in: Fluid-Structure-Sound Interactions and Control

Verlag: Springer Berlin Heidelberg

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Abstract

In this paper we consider a strategy to manipulate the large-scale structures in wall-bounded turbulent flows, which have recently been shown to be a key mechanism for modulating levels of the skin-friction drag. For this, we use a rectangular wall-normal jet to target the large-scale structures as detected by an upstream spanwise array of skin-friction sensors. A second spanwise array of sensors, located downstream of the jet, records any modifications to the large-scale structure. In addition, a traversing hotwire probe is mounted above the second spanwise array of sensors to study the effects across the depth of boundary layer. It is found that the jet is able to create a low-speed region and when targeted on a high-speed structure changes the associated footprint at the wall.

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Vorheriges Kapitel A Look at the Turbulent Wake Using Scale-By-Scale Energy Budgets

Nächstes Kapitel Triangular Tabs for Supersonic Jet Mixing Enhancement

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Titel: Controlling the Large-Scale Motions in a Turbulent Boundary Layer
verfasst von: I. Marusic
K. M. Talluru
N. Hutchins
Verlag: Springer Berlin Heidelberg
Buch: Fluid-Structure-Sound Interactions and Control
Print ISBN: 978-3-642-40370-5

Electronic ISBN: 978-3-642-40371-2

Copyright-Jahr: 2014
DOI: https://doi.org/10.1007/978-3-642-40371-2_2

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