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Turbulent rotating disk flow with inward throughflow

Published online by Cambridge University Press:  13 January 2005

S. PONCET,
M. P. CHAUVE and
P. LE GAL
S. PONCET
Affiliation:
IRPHE, UMR 6594, CNRS – Université d'Aix-Marseille I & II, Technopôle Château-Gombert, 49, rue F. Joliot-Curie, 13384 Marseille cédex 13, France
M. P. CHAUVE
Affiliation:
IRPHE, UMR 6594, CNRS – Université d'Aix-Marseille I & II, Technopôle Château-Gombert, 49, rue F. Joliot-Curie, 13384 Marseille cédex 13, France
P. LE GAL
Affiliation:
IRPHE, UMR 6594, CNRS – Université d'Aix-Marseille I & II, Technopôle Château-Gombert, 49, rue F. Joliot-Curie, 13384 Marseille cédex 13, France
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Abstract

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The evolution of the entrainment coefficient $K$ of the rotating fluid in a rotor–stator cavity with an inward throughflow and pre-rotation is studied according to the flow parameters. Measurements are obtained in water for a turbulent Batchelor type of flow with two separated boundary layers on the rotating and stationary disks by means of a laser Doppler anemometer, and the results are compared to those performed using pressure transducers. We show that the entrainment coefficient $K$ depends on a local flow rate coefficient $Cq_r$ according to a $5/7$ power law whose coefficients depend on the boundary conditions. A theoretical analysis confirms this behaviour of $K$.

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Type
Papers
Information
Journal of Fluid Mechanics , Volume 522 , 10 January 2005, pp. 253 - 262
Copyright
© 2005 Cambridge University Press