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Hydraulic performance of the control butterfly valves of the bottom outlet of Kassa chai dam
Joint Authors
Majid, Nimat Mustafa
al-Zubaydi, Riyad Zuhayr
Source
ZANCO Journal of Pure and Applied Sciences
Issue
Vol. 30, Issue 1 (sup) (28 Feb. 2018), pp.142-151, 10 p.
Publisher
Salahaddin University-Erbil Department of Scientific Publications
Publication Date
2018-02-28
Country of Publication
Iraq
No. of Pages
10
Main Subjects
Earth Sciences, Water and Environment
Abstract EN
The bottom outlet of Kassa Chai Dam, Kirkuk, Iraq was designed and constructed to control the storage outflow by using two 1.4m diameter butterfly valves at its end two branches.
During the dam commissioning, a series of operation tests were conducted on the bottom outlet under different openings of its valves.
Intense noise and vibration were noticed and reported at these valves.
To specify the causes of these intense noise and vibration and to propose solutions to eliminate them, the velocity profiles and pressure variations along the bottom outlet of Kassa Chai Dam and at its valves were investigated.
A full-scale 3D mathematical model for the bottom outlet was analyzed by using the commercial CFD code Fluent.
CFD Fluent based on solving Navier-Stock equations by finite volume method.
The standard k-ε turbulence model was selected to deal with turbulence.
Simulations were carried out under different operation conditions, including different water levels of the dam reservoir and different angles of the valves opening as well.
Outline from study showed that negative pressures developed at the downstream side of the valve especially at small angles of valve openings.
To overcome the problem of negative pressure, a suitable solution is suggested to improve the outlet performance by installing a cone valve at the downstream end of the bottom outlet.
Results of investigation when using the cone valve showed that no negative pressure developed at the end of the bottom outlet.
American Psychological Association (APA)
al-Zubaydi, Riyad Zuhayr& Majid, Nimat Mustafa. 2018. Hydraulic performance of the control butterfly valves of the bottom outlet of Kassa chai dam. ZANCO Journal of Pure and Applied Sciences،Vol. 30, no. 1 (sup), pp.142-151.
https://search.emarefa.net/detail/BIM-1403029
Modern Language Association (MLA)
al-Zubaydi, Riyad Zuhayr& Majid, Nimat Mustafa. Hydraulic performance of the control butterfly valves of the bottom outlet of Kassa chai dam. ZANCO Journal of Pure and Applied Sciences Vol. 30, no. 1 (Supplement) (2018), pp.142-151.
https://search.emarefa.net/detail/BIM-1403029
American Medical Association (AMA)
al-Zubaydi, Riyad Zuhayr& Majid, Nimat Mustafa. Hydraulic performance of the control butterfly valves of the bottom outlet of Kassa chai dam. ZANCO Journal of Pure and Applied Sciences. 2018. Vol. 30, no. 1 (sup), pp.142-151.
https://search.emarefa.net/detail/BIM-1403029
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 150-151
Record ID
BIM-1403029