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Flow, Turbulence and Combustion
Erschienen in: Flow, Turbulence and Combustion 3-4/2017

18.10.2017

Influence of a Large-Eddy-Breakup-Device on the Turbulent Interface of Boundary Layers

verfasst von: Cheng Chin, Ramis Örlü, Philipp Schlatter, Jason Monty, Nicholas Hutchins

Erschienen in: Flow, Turbulence and Combustion | Ausgabe 3-4/2017

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Abstract

The effects of implementing a large-eddy break-up device (LEBU) in a turbulent boundary layer on the interaction with the boundary layer is investigated with particular emphasis on the turbulent/non-turbulent interface (TNTI). The simulation data is taken from a recent well-resolved large eddy simulation (Chin et al. Flow Turb. Combust. 98, 445–460 2017), where the LEBU was implemented at a wall-normal distance of 0.8 δ (local boundary layer thickness) from the wall. A comparison of the TNTI statistics is performed between a zero-pressure-gradient boundary layer with and without the LEBU. The LEBU is found to delay the growth of the turbulent boundary layer and also attenuates the fluctuations of the TNTI. The LEBU appears to alter the structure size at the interface, resulting in a narrower and shorter dominant structure (in an average sense). Further analysis beneath the TNTI using two-point correlations shows that the LEBU affects the turbulent structures in excess of 100 δ downstream of the LEBU.
Vorheriger Artikel The Effect of Wall Normal Actuation on a Turbulent Boundary Layer
Nächster Artikel Numerical Investigation of the Flow Past a Rotating Golf Ball and Its Comparison with a Rotating Smooth Sphere

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Metadaten
Titel
Influence of a Large-Eddy-Breakup-Device on the Turbulent Interface of Boundary Layers
verfasst von
Cheng Chin
Ramis Örlü
Philipp Schlatter
Jason Monty
Nicholas Hutchins
Publikationsdatum
18.10.2017
Verlag
Springer Netherlands
Erschienen in
Flow, Turbulence and Combustion / Ausgabe 3-4/2017
Print ISSN: 1386-6184
Elektronische ISSN: 1573-1987
DOI
https://doi.org/10.1007/s10494-017-9861-7

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