NDLI: Optimum air-demand ratio for maximum aeration efficiency in high-head gated circular conduits.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Ozkan, Fahri Tuna, M. Cihat Baylar, Ahmet Ozturk, Mualla
Description	Country affiliation: Turkey Author Affiliation: Ozkan F ( Civil Engineering, Firat University, Elazig, 23119, Turkey.); Tuna MC ( Civil Engineering, Firat University, Elazig, 23119, Turkey.); Baylar A ( Faculty of Architecture and Design, Zirve University, Gaziantep, 27260, Turkey E-mail: ahmet.baylar@zirve.edu.tr.); Ozturk M ( Civil Engineering, Firat University, Elazig, 23119, Turkey.)
Abstract	Oxygen is an important component of water quality and its ability to sustain life. Water aeration is the process of introducing air into a body of water to increase its oxygen saturation. Water aeration can be accomplished in a variety of ways, for instance, closed-conduit aeration. High-speed flow in a closed conduit involves air-water mixture flow. The air flow results from the subatmospheric pressure downstream of the gate. The air entrained by the high-speed flow is supplied by the air vent. The air entrained into the flow in the form of a large number of bubbles accelerates oxygen transfer and hence also increases aeration efficiency. In the present work, the optimum air-demand ratio for maximum aeration efficiency in high-head gated circular conduits was studied experimentally. Results showed that aeration efficiency increased with the air-demand ratio to a certain point and then aeration efficiency did not change with a further increase of the air-demand ratio. Thus, there was an optimum value for the air-demand ratio, depending on the Froude number, which provides maximum aeration efficiency. Furthermore, a design formula for aeration efficiency was presented relating aeration efficiency to the air-demand ratio and Froude number.
File Format	HTM / HTML
ISSN	02731223
Issue Number	5
Journal	Water Science & Technology
Volume Number	70
e-ISSN	19969732
Language	English
Publisher	IWA Publishing
Publisher Date	2014-01-01
Publisher Place	Great Britain (UK)
Access Restriction	Subscribed
Subject Keyword	Discipline Hydrology Oxygen Water Quality Water Regression Analysis Temperature Water Supply Journal Article Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Environmental Engineering Water Science and Technology

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