Air uptake along the lower nappe of a spillway aerator

Alberto Carlos De Melo Lima; Harry Edmar Schulz; John S. Gulliver

doi:10.3826/jhr.2008.3296

Air uptake along the lower nappe of a spillway aerator

Alberto Carlos De Melo Lima, Harry Edmar Schulz, John S. Gulliver

Civil, Environmental, and Geo- Engineering

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

Air concentration measurements performed along the lower nappe of a bottom aerator through the impact and downstream flow regions permitted the calculation of air entrainment along the jet length. The air uptake was also measured in the air supply conduit. It was shown that integration of the concentration profiles along the jet overestimates the air uptake measured in the air supply conduit. Corrective procedures were developed by adapting the concept of entrained and entrapped air, in which the latter is re-circulated in the cavity, but both are measured by air concentration probes.

Original language	English (US)
Pages (from-to)	839-843
Number of pages	5
Journal	Journal of Hydraulic Research
Volume	46
Issue number	6
DOIs	https://doi.org/10.3826/jhr.2008.3296
State	Published - 2008

Bibliographical note

Funding Information:
The Authors thank Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (pr. 2201/06-2) and Fundação de Amparo à Pesquisa do Estado de São Paulo, for supporting this research.

Keywords

Air concentration measurements
Air entrainment
Air uptake
Air-water flows
Spillway aerators
Void ratio

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title = "Air uptake along the lower nappe of a spillway aerator",

abstract = "Air concentration measurements performed along the lower nappe of a bottom aerator through the impact and downstream flow regions permitted the calculation of air entrainment along the jet length. The air uptake was also measured in the air supply conduit. It was shown that integration of the concentration profiles along the jet overestimates the air uptake measured in the air supply conduit. Corrective procedures were developed by adapting the concept of entrained and entrapped air, in which the latter is re-circulated in the cavity, but both are measured by air concentration probes.",

keywords = "Air concentration measurements, Air entrainment, Air uptake, Air-water flows, Spillway aerators, Void ratio",

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AU - Gulliver, John S.

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KW - Air-water flows

KW - Spillway aerators

KW - Void ratio

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Air uptake along the lower nappe of a spillway aerator

Abstract

Bibliographical note

Keywords

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