The Study of Hydraulic Properties of Quarter-Circular Crested Stepped Spillway
Publish Year: 1399
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_JISE-43-4_003
تاریخ نمایه سازی: 12 مهر 1400
Abstract:
In this paper, the quarter-circular crested stepped spillway (QCSS) is introduced and its hydraulic properties including the discharge coefficient (Cd) and energy dissipation of flow are investigated. The QCSS consists of a quarter-circular as the crest and a stepped chute. The Cd of QCSS variates between ۰.۹ and ۱.۴ considering the range of relative upstream head (hup/R) between ۰.۱ and ۱.۰, but at the same range of hup/R, the Cd of the broad crested stepped spillway (BCSS) changes between ۰.۹ and ۱.۰. The ratio of energy dissipation changes between ۳۰% and ۹۸% for both hydraulic models. Comparing the performance of QCSS and BCSS shows that in the skimming flow condition, the Cd of QCSS is about ۳۰%more than the BCSS. Whereas, in the same flow regime, the energy dissipation of the flow on QCSS is a bit less than the BCSS about ۱۰%.
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Authors
Abbas Parsaie
Former PhD candidate of Hydro-Structure Engineering, Water Engineering Department, Lorestan University and Assistant Professor of Shahid Chamran University of Ahvaz. Iran.
AmirHamzeh Haghiabi
Professor, Water Engineering Department, Lorestan University, Khorramabad, Iran.
Mojtaba Saneie
Associate Professor, Soil Conservation and Watershed Management Institute, Tehran, Iran.
Hasan Torabi
Lorestan University
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