Drag Characteristics of Two-Dimensional Sills in Forced Hydraulic Jumps
Publication: Journal of Hydraulic Engineering
Volume 138, Issue 5
Abstract
Sills and other appurtenances are often used to aid the formation of a hydraulic jump in a stilling basin. The drag force acting on a sill in forced hydraulic jump depends on the initial Froude number , the height of the sill , and its distance , measured from the toe of the jump. The forward flow in the main body of the hydraulic jump behaves like a wall jet. Therefore, based on observed data, simple relationships were developed to predict the maximum velocity and the half-width of a free hydraulic jump. These are coupled with a dynamic pressure model that expresses the local drag coefficient of a sill in a plane turbulent wall jet. The drag coefficient for the sill in a forced hydraulic jump was obtained by a simple transformation involving the wall jet parameters.
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Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 138 • Issue 5 • May 2012
Pages: 462 - 466
Copyright
© 2012. American Society of Civil Engineers.
History
Received: Dec 27, 2010
Accepted: Nov 29, 2011
Published online: Dec 1, 2011
Published in print: May 1, 2012
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