Flip Bucket without and with Deflectors
Publication: Journal of Hydraulic Engineering
Volume 126, Issue 11
Abstract
Flip buckets are commonly used to discharge flow away from a hydraulic structure into a plunge pool to dissipate energy. In the past, flip buckets have often been designed in accordance with site-related hydraulic model studies. Consequently, limited generalized design guidelines are available. The present study considers flip buckets either in a prismatic rectangular channel or extended by a lateral deflector resulting in a curved jet trajectory. The main features of flip buckets are investigated, including scale effects in hydraulic models, bucket pressure distribution, and nappe trajectories with and without the presence of deflectors. An analysis is presented mainly involving the approach Froude number, the so-called bend number, and the bucket takeoff angle. It is demonstrated that the near field of a bucket-deflected jet follows the conventional parabola of a mass point, provided that the takeoff angle is correctly accounted for and that the flow is scaled using the Froude similarity law. Furthermore, shock-wave features for a flip bucket with a deflector are specified, and the governing choking relations are derived based on an experimental approach.
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Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 126 • Issue 11 • November 2000
Pages: 837 - 845
History
Received: Sep 24, 1999
Published online: Nov 1, 2000
Published in print: Nov 2000
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