Self‐Aerated Flows on Chutes and Spillways
Publication: Journal of Hydraulic Engineering
Volume 119, Issue 2
Abstract
In open channel flows, an important design parameter is the amount of entrained air. The presence of air within the flow increases not only the bulk of the flow, but also the transfer of atmospheric gases (e.g. oxygenation). Further aeration of high‐velocity flows may prevent or reduce cavitation damage. The present paper reviews the characteristics of self‐aerated flows on spillways and chutes, including uniform flows and gradually varied flows. First, the uniform flow conditions are presented with new prototype results. Similarities with suspended‐sediment flows and extremely rough flows are developed and the interaction between air bubbles and turbulence is discussed. Then, the basic equations for gradually varied flows are developed using the same method as Wood in 1985. The results are applied to chutes and tunnel spillways and are compared with experimental data.
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Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 119 • Issue 2 • February 1993
Pages: 220 - 243
Copyright
Copyright © 1993 American Society of Civil Engineers.
History
Received: Oct 23, 1991
Published online: Feb 1, 1993
Published in print: Feb 1993
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