Design of Open‐Channel‐Contraction Tranisitions
Publication: Journal of Irrigation and Drainage Engineering
Volume 120, Issue 3
Abstract
Open-channel contractions for subcritical flows are encountered in the design of many hydraulic structures in which flow is flumed for reasons of economy. In all the works associated with fluming of canals, suitable transitions are necessary to minimize the head losses. Existing knowledge of the design of contraction transitions is inadequate because no attention is paid to minimizing the head loss. In this note, applying optimal-control theory, a methodology for design of contraction transition for a subcritical flow has been developed. Analyzing a large number of optimally designed transitions, empirical equations for bed width, side slope, and bed-elevation profiles have been obtained. It is hoped that these equations will find use in the design of fluming structures.
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Information & Authors
Information
Published In
Journal of Irrigation and Drainage Engineering
Volume 120 • Issue 3 • May 1994
Pages: 660 - 668
Copyright
Copyright © 1994 American Society of Civil Engineers.
History
Received: Nov 19, 1992
Published online: May 1, 1994
Published in print: May 1994
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