Oxygen Transfer Similitude for Vented Hydroturbine
Publication: Journal of Hydraulic Engineering
Volume 123, Issue 6
Abstract
A similitude relationship for the oxygen transfer that occurs in a vented hydroturbine is developed with reference to scaling between a homologous turbine model and a full-size turbine installation (prototype). Three basic parameters are identified as important for the scaling of oxygen transfer: the liquid film coefficient, the specific surface area, and the contact time. The similitude relation is then developed with existing theories on turbine hydrodynamics, bubble hydrodynamics, and interfacial mass transfer. The only model-prototype data set currently available is used to empirically fit one coefficient and to test the theory. Model-prototype similitude for oxygen transfer is primarily a function of gas-void ratio, rotational speed, and runner diameter with diffusivity, surface tension, and density playing a lesser role.
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Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 123 • Issue 6 • June 1997
Pages: 529 - 538
Copyright
Copyright © 1997 American Society of Civil Engineers.
History
Published online: Jun 1, 1997
Published in print: Jun 1997
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