L2F measurements of the flow at the exit of modern unshrouded centrifugal impellers with backswept blades yield a much more uniform velocity profile compared to former measurements on impellers with radial blading. Further evaluations show that the “classical” jet-wake theory assuming an isentropic jet and a wake flow congruent with the shape of the blade at the impeller exit needs correction in order to obtain meaningful results when interpreting thermodynamic measurements on centrifugal compressor stages.
Investigation of the Flow at the Exit of an Unshrouded Centrifugal Impeller and Comparison With the “Classical” Jet-Wake Theory
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Rohne, K, & Banzhaf, M. "Investigation of the Flow at the Exit of an Unshrouded Centrifugal Impeller and Comparison With the “Classical” Jet-Wake Theory." Proceedings of the ASME 1990 International Gas Turbine and Aeroengine Congress and Exposition. Volume 1: Turbomachinery. Brussels, Belgium. June 11–14, 1990. V001T01A033. ASME. https://doi.org/10.1115/90-GT-124
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