Chapter
Dec 31, 2015
Guidelines for the Design of Air Bubble Systems
Author: Nabil IsmailAuthor Affiliations
Publication: Coastal Engineering 1976
Abstract
Based on a literature review of theoretical and experimental work on air-bubble systems, guidelines for the ideal design of submerged distributors discharging air into water are presented.
A comprehensive study of gas-liquid dispersions was carried out to find out the effect of physical properties, distributor arrangement, and the air flow rate, on the flow pattern within the jet. This review revealed that the distributor arrangement largely influences the characteristics of the dispersion within the zone of flow establishment. Also, upon analyzing the experimental results of air-water systems, it was found that the zone of flow establishment extends to greater distances of the water depth than that in the case of one-phase turbulent plumes. Furthermore, the experimental results showed that the efficiency of air bubble plumes can be increased by the proper design of the distributor.
Recommendations for the distributor design are given, which include, diameter of orifices and their spacings, pressure drop across orifices, number of manifolds, and the maximum air flow rate.
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Published In
Coastal Engineering 1976
Pages: 2994 - 3013
Copyright
© 1977 American Society of Civil Engineers.
History
Published online: Dec 31, 2015
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Authors
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Nabil Ismail
On a Study Leave from Civil Engn. Dept., Alexandria University, Alexandria, A. R. Egypt.
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