Predicting the Filling of Ventilated Cavities Behind Spillway Aerators

Chanson, Hubert (1995) Predicting the Filling of Ventilated Cavities Behind Spillway Aerators. Journal of Hydraulic Research, 33 3: 361-372.

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Author Chanson, Hubert
Title Predicting the Filling of Ventilated Cavities Behind Spillway Aerators
Journal name Journal of Hydraulic Research   Check publisher's open access policy
ISSN 0022-1686
Publication date 1995-01-01
Sub-type Article (original research)
Volume 33
Issue 3
Start page 361
End page 372
Total pages 12
Language eng
Subject 290802 Water and Sanitary Engineering
290800 Civil Engineering
Abstract Cavitation damage to spillway surfaces may be prevented with the use of aeration devices. These serve to introduce air in the layers close to the channel bottom in order to reduce cavitation erosion. Under some circumstances, the aerator can be drowned out and will cease to protect the spillway surface. This article analyses the conditions of filling. Then experimental data for ten aerator geometries are reviewed. Depending upon the aerator geometry, the cavity filling occurs when the Froude number is less than a critical value or when the ratio of the flow depth over the total offset is larger than a characteristic value.
Keyword spillway aeration devices
air flow
submergence
cavitation damage prevention
cavity filling
ventilated cavity flows
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Civil Engineering Publications
 
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Created: Fri, 02 Sep 2005, 10:00:00 EST by Hubert Chanson