Abstract
Most flows of relevance in technical applications are exposed to the combined effect of surface curvature and pressure gradient. The applicability of knowledge from canonical wall-bounded flows is hence limited when it comes to these complex flows and geometries. The present investigation is an attempt to contribute to this topic, by experimentally investigating the turbulent boundary layer developing upstream, over, and downstream a wall-mounted cylinder section. Hot-wire anemometry is used and although such measurements are impaired in the separated region, we show here how to exploit the readings to get information on the separated region. Single-point streamwise velocity statistics are presented and discussed with focus on the effect of back flow (separation) on the statistics and the emergence of an internal boundary layer.
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Acknowledgments
FRANCE project leader is Prof. Gunilla Efraimsson, KTH (also task leader for the numerical part of the project). The project is carried out in collaboration with Scania CV AB (Dr. Per Elofsson) and is partially financed by the Swedish Energy Agency.
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Vernet, J.A., Örlü, R., Alfredsson, P.H. (2016). Turbulent Boundary Layer Upstream, Over and Downstream a Cylindrical 2D Bump. In: Peinke, J., Kampers, G., Oberlack, M., Wacławczyk, M., Talamelli, A. (eds) Progress in Turbulence VI. Springer Proceedings in Physics, vol 165. Springer, Cham. https://doi.org/10.1007/978-3-319-29130-7_48
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DOI: https://doi.org/10.1007/978-3-319-29130-7_48
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