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Article

Near-Wall Flow in Turbomachinery Cascades—Results of a German Collaborative Project

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Chair of Thermal Turbomachines and Aeroengines, Department of Mechanical Engineering, Ruhr University Bochum, Universitätsstr. 150, 44801 Bochum, Germany
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Chair of Turbomachinery and Flight Propulsion, Institute of Fluid Mechanics, Technische Universität Dresden, 01062 Dresden, Germany
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Chair of Fluid Mechanics, Institute of Fluid Mechanics, Technische Universität Dresden, 01062 Dresden, Germany
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Institute of Jet Propulsion, Bundeswehr University Munich, Werner-Heisenberg-Weg 39, 85577 Neubiberg, Germany
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Author to whom correspondence should be addressed.
Academic Editor: Piotr Doerffer
Int. J. Turbomach. Propuls. Power 2021, 6(2), 9; https://doi.org/10.3390/ijtpp6020009
Received: 6 January 2021 / Revised: 7 April 2021 / Accepted: 22 April 2021 / Published: 8 May 2021
This article provides a summarizing account of the results obtained in the current collaborative work of four research institutes concerning near-wall flow in turbomachinery. Specific questions regarding the influences of boundary layer development on blades and endwalls as well as loss mechanisms due to secondary flow are investigated. These address skewness, periodical distortion, wake interaction and heat transfer, among others. Several test rigs with modifiable configurations are used for the experimental investigations including an axial low speed compressor, an axial high-speed wind tunnel, and an axial low-speed turbine. Approved stationary and time resolving measurements techniques are applied in combination with custom hot-film sensor-arrays. The experiments are complemented by URANS simulations, and one group focusses on turbulence-resolving simulations to elucidate the specific impact of rotation. Juxtaposing and interlacing their results the four groups provide a broad picture of the underlying phenomena, ranging from compressors to turbines, from isothermal to non-adiabatic, and from incompressible to compressible flows. View Full-Text
Keywords: near-wall flow; boundary layer; wake interaction; compressor; turbine; cascade; experimental investigation; CFD; large eddy simulation; direct numerical simulation near-wall flow; boundary layer; wake interaction; compressor; turbine; cascade; experimental investigation; CFD; large eddy simulation; direct numerical simulation
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MDPI and ACS Style

Engelmann, D.; Sinkwitz, M.; di Mare, F.; Koppe, B.; Mailach, R.; Ventosa-Molina, J.; Fröhlich, J.; Schubert, T.; Niehuis, R. Near-Wall Flow in Turbomachinery Cascades—Results of a German Collaborative Project. Int. J. Turbomach. Propuls. Power 2021, 6, 9. https://doi.org/10.3390/ijtpp6020009

AMA Style

Engelmann D, Sinkwitz M, di Mare F, Koppe B, Mailach R, Ventosa-Molina J, Fröhlich J, Schubert T, Niehuis R. Near-Wall Flow in Turbomachinery Cascades—Results of a German Collaborative Project. International Journal of Turbomachinery, Propulsion and Power. 2021; 6(2):9. https://doi.org/10.3390/ijtpp6020009

Chicago/Turabian Style

Engelmann, David, Martin Sinkwitz, Francesca di Mare, Björn Koppe, Ronald Mailach, Jordi Ventosa-Molina, Jochen Fröhlich, Tobias Schubert, and Reinhard Niehuis. 2021. "Near-Wall Flow in Turbomachinery Cascades—Results of a German Collaborative Project" International Journal of Turbomachinery, Propulsion and Power 6, no. 2: 9. https://doi.org/10.3390/ijtpp6020009

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