Vortices in Hydraulics
Publication: Journal of Hydraulic Engineering
Volume 117, Issue 4
Abstract
Eleventh Hunter Rouse Lecture recounts the writer's 40 years of theoretical and experimental researches concerning the inception, development, and damaging action of vortices. It was found that a vertical vortex is normally formed in an unstable environment, in the presence of a diverging or converging flat jet that subsequently feeds it by momentum transfer. A tentative explanation of the intermittency of swirls at intakes was obtained proving the theoretical viability of vortices whose intensity varies more or less periodically along their axes. The inspection of intermittent vortices that develop spontaneously behind a weir or under a sluice gate led to the establishment of a universal Strouhal law, able to predict the frequency of the oscillations that can be excited within a restrained fluid body by a free current flowing along it, and, as a consequence, the frequency of vortex shedding and the structural vibrations that this phenomenon may induce. Applications that define the causes of revetment damages in hydraulic structures are made.
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Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 117 • Issue 4 • April 1991
Pages: 399 - 413
Copyright
Copyright © 1990 ASCE.
History
Published online: Apr 1, 1991
Published in print: Apr 1991
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