On the Interaction of Freestream Turbulence and Attachment-Line Boundary Layer

Fumarola, Isabella, Gaster, Michael and Atkin, Chris J. (2021) On the Interaction of Freestream Turbulence and Attachment-Line Boundary Layer. In: IUTAM Laminar-Turbulent Transition. IUTAM Laminar-Turbulent Transition . Springer, Cham, pp. 181-191. ISBN 978-3-030-67901-9

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Abstract

One of the possible forcing mechanisms for inducing transition from laminar to turbulent flow is freestream turbulence. Among the different transition mechanisms, freestream turbulence influences the cross-flow instability which occurs on swept wings. In order to understand better the physical interaction between freestream turbulence and boundary layer, this work analyses how the turbulence is distorted approaching a leading edge and whether it is amplified approaching a swept leading edge. The paper contains a brief literature review of both the two-dimensional stagnation point and three-dimensional attachment-line flows. This reveals that freestream turbulence amplification has been investigated for two-dimensional leading edge flows, but there is a lack of research on the swept leading edge. In addition, the paper presents some experimental results on a circular cylinder at various sweep angles. The results show that the phenomenon observed at the two-dimensional stagnation point also occurs at a swept attachment-line, although some differences are identified.

Item Type: Book Section
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Depositing User: LivePure Connector
Date Deposited: 06 Aug 2021 23:40
Last Modified: 05 Sep 2021 23:38
URI: https://ueaeprints.uea.ac.uk/id/eprint/81005
DOI: 10.1007/978-3-030-67902-6_15

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