Journal ArticleDOI
Air-Entrainment in High Head Gated Conduits
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TLDR
In this article, the authors developed a suitable relationship and diagrams to predict results compatible with prototype measurements, based on systematic experiments backed by theoretical considerations, and found that no linear relationship has been found between the head and the maximum air-entraining capacity of the flow.Abstract:
For the successful operation of high head gated conduits, adequate supply of air is of paramount importance. However, no dependable solution is yet available to determine the required quantity of air for different flow types. Based on systematic experiments backed by theoretical considerations, suitable relationships and diagrams have been developed that predict results compatible with prototype measurements. Conduit roughness has no significant effect on air-entrainment. No linear relationship has been found to exist between the head and the maximum air-entraining capacity of the flow. Measurements of air velocity by means of high speed cinematography indicate that the velocity at the interface is much higher than the mean velocity of water flow and that the air velocity distribution is far removed from being logarithmic.read more
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Air-water flow in hydraulic structures
TL;DR: In this paper, air-water flow in hydraulic structures, Air-Water flow in hydraulics, air water flow, and hydraulic structures are discussed in the context of hydraulic structures.
Journal ArticleDOI
Air-water flow in bottom outlets
Jürg Speerli,Willi H. Hager +1 more
TL;DR: In this paper, both air entrainment and air detrainment processes were evaluated using a hydrau... and the results showed that both processes are significant depending on the tunnel length.
Journal ArticleDOI
Hydraulic Structures in Water Aeration Processes
TL;DR: In this article, the authors reviewed the literature on hydraulic structures used in water aeration processes and divided them into two groups as the high-head flow systems and the free-surface flow systems.
Journal ArticleDOI
Encouraging Effective Air Management in Water Pipelines: A Critical Review
TL;DR: In this article, the sources of air in pipes and key consequences associated with its presence are reviewed and critiqued, and knowledge gaps that limit the efficient application of current air management strategies to real world problems are identified, and suggestions for future development are presented.