Experimental Study of Piano Key Weir by Changing Width Ratio of the Keys

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Saeidi S.M.H.; RAHIMPOUR M.; ZOUNEMAT KERMANI M.; MADADI M.R.

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Journal: Irrigation and Drainage Structures Engineering Research Year:2020 | Volume:20 | Issue:77 Page(s): 57-82

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Information Journal Paper

Title

Experimental Study of Piano Key Weir by Changing Width Ratio of the Keys

Author(s)

Saeidi S.M.H. | RAHIMPOUR M. | ZOUNEMAT KERMANI M. | MADADI M.R. | Issue Writer Certificate

Keywords

Flow CharacteristicsQ1

Flow MeasurementQ1

Geometrical DimensionsQ2

Physical ModelQ2

Abstract

Introduction: Piano key weir (PKW) is a hydraulic structure that can be installed at dams and canals for regulating the flow surface and discharge. The main feature of this weir is the ability to pass a large flow of water over a small head. Regarding its geometrical properties, this weir is classified into four types of A, B, C and D. PKW with symmetrical upstream and downstream overhangs is classified as Type A, one with only upstream overhangs as Type B, one with only downstream overhangs as Type C, and one without overhangs as Type D. Despite various studies on piano key weirs (some of which were mentioned in the text), the flow behaiviour over these structures is very complex, unpredictable and three-dimensional. So further laboratory investigations on PKWs are needed. In the present study, the effect of the width of the inlet and outlet keys on the hydraulic characteristics of these weirs is investigated. In addition, the occurrence of undular flow on these types of weirs is reported for the first time. To achieve the aims of this study, more than 300 experiments were conducted at a laboratory flume...

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APA: Copy

Saeidi, S.M.H., RAHIMPOUR, M., ZOUNEMAT KERMANI, M., & MADADI, M.R.. (2020). Experimental Study of Piano Key Weir by Changing Width Ratio of the Keys. IRRIGATION AND DRAINAGE STRUCTURES ENGINEERING RESEARCH , 20(77 ), 57-82. SID. https://sid.ir/paper/369625/en

Vancouver: Copy

Saeidi S.M.H., RAHIMPOUR M., ZOUNEMAT KERMANI M., MADADI M.R.. Experimental Study of Piano Key Weir by Changing Width Ratio of the Keys. IRRIGATION AND DRAINAGE STRUCTURES ENGINEERING RESEARCH [Internet]. 2020;20(77 ):57-82. Available from: https://sid.ir/paper/369625/en

IEEE: Copy

S.M.H. Saeidi, M. RAHIMPOUR, M. ZOUNEMAT KERMANI, and M.R. MADADI, “Experimental Study of Piano Key Weir by Changing Width Ratio of the Keys,” IRRIGATION AND DRAINAGE STRUCTURES ENGINEERING RESEARCH , vol. 20, no. 77 , pp. 57–82, 2020, [Online]. Available: https://sid.ir/paper/369625/en

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